JP7214169B1 - underwear for lower body - Google Patents

Abstract

An object of the present invention is to provide underwear for the lower body that is comfortable to wear and can effectively increase the amount of physical activity. A pair of boxer shorts 1 is underwear for the lower half of the body that is in close contact with the wearer's skin. The boxer shorts 1 have a crotch portion 50 arranged corresponding to the wearer's crotch. The crotch portion 50 is entirely knitted by plain knitting and has a first portion 511 knitted by floating knitting having a thickness greater than that of plain knitting. The first portion 511 has a belt shape and extends in the front-rear direction at the center of the crotch portion 50 in the left-right direction. [Selection drawing] Fig. 8

Description

The present invention relates to underwear for the lower body.

It has been demonstrated that people who are physically active and physically active have a lower risk of developing non-communicable diseases than those who are less active. Noncommunicable disease is a general term for chronic diseases such as cancer, diabetes, cardiovascular disease, respiratory disease, and mental health. A person whose amount of physical activity has decreased may experience weakened muscle strength, stiff joints, and poor posture. Such people may develop orthopedic symptoms such as low back pain, hip pain, and knee joint pain, and autonomic symptoms such as insomnia.

In physical activity, the pelvis and hip joints are important parts. Weakening of the pelvic floor muscles in the pelvis is likely to induce various symptoms such as urinary leakage and fecal incontinence, and may also cause erectile dysfunction in men. Training the muscles around the pelvis is effective in preventing and improving these symptoms, and also leads to weight loss and injury prevention.

Patent Document 1 discloses a conventional underwear. This underwear has a center belt portion that passes through the wearer's crotch and holds the pelvic floor muscles in an upwardly pulled position. According to this undergarment, the pelvic floor muscles are pulled up and held, so frequent urination of the wearer can be improved and prevented.

JP 2020-176335 A

In the underwear described above, the center belt portion holds the pelvic floor muscles at a position 1 cm above the height position when the underwear is not worn. Therefore, this underwear exerts a pulling force on the pelvic floor muscles, so that the wearer feels tight and is not comfortable to wear.

In addition to such undergarments, spats and tights for improving exercise function and correcting posture are known. These compress the pelvis and surrounding areas to improve joint stability, lubricate muscle activity, and increase venous return. Increasing venous return can reduce edema, fatigue, and coldness. There are also spats and support tights that employ a structure based on taping theory. However, even in these cases, the wearer may feel tightness due to fixation or pressure.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide underwear for the lower body that is comfortable to wear and can effectively increase the amount of physical activity.

In order to achieve the above object, a lower-body underwear according to the present invention is a lower-body underwear that is in close contact with the wearer's skin, wherein the crotch is entirely knitted by a first knitting method, It has a first portion knitted by a second knitting method that is thicker than the first knitting method, the first portion has a belt shape, and extends in the front-rear direction at the center of the crotch in the left-right direction. It is characterized by being extended.

In the present invention, the crotch further includes a second portion having a belt shape knitted by the second weaving method and a third portion having a belt shape knitted by the second knitting method. Preferably, the first portion, the second portion, and the third portion intersect at one intersection point.

In the present invention, the lower body underwear includes a body portion surrounding at least the lower abdomen, waist and buttocks of the wearer, a right leg portion surrounding the root of the right thigh of the wearer, and a left thigh portion of the wearer. a left leg surrounding the base of the thigh, the right leg having a right trigone knitted in the second knitting method, the left leg knitted in the second knitting method. a left trigone knitted on the other side, wherein the right trigone is positioned corresponding to the inner side of the base of the wearer's right thigh, and the left trigone is positioned on the wearer's right thigh; positioned corresponding to the medial side of the base of the left thigh, the apex of the right leg trigone facing the intersection, and the vertex of the left trigone facing the intersection; is preferred.

In the present invention, the body portion is entirely knitted by the first knitting method and has a fourth portion knitted by the second knitting method, and the fourth portion is the wearing cloth. preferably corresponding to at least one of the rectus abdominis muscle, internal oblique muscle, iliopsoas muscle, gluteus medius muscle, vastus lateralis muscle, sacroiliac joint, gluteus maximus muscle and groin of the human body.

In order to achieve the above object, the lower body underwear according to the present invention comprises:
Underwear for the lower body that is in close contact with the wearer's skin,
a body portion surrounding at least the wearer's lower abdomen, waist, and buttocks; and a crotch portion;
the crotch portion having a central portion, a right leg trigone and a left trigone;
Parts of the crotch portion other than the central portion, the right triangular portion and the left triangular portion are knitted by a first knitting method,
The central portion, the right triangular portion and the left triangular portion are knitted by a second knitting method having a thickness greater than that of the first knitting method,
The central portion has a belt shape and extends in the front-rear direction at the center of the crotch portion in the left-right direction, a second portion having a belt shape, and a third portion having a belt shape; has
The first portion, the second portion, and the third portion intersect at one intersection,
The right trigone part is arranged corresponding to the inner side of the root of the wearer's right thigh,
The left trigone part is arranged corresponding to the inner side of the base of the left thigh of the wearer,
the vertex of the right leg trigone faces the intersection;
the vertex of the left leg trigone faces the intersection;
The main body is knitted by the second knitting method, the central front portion, the right front belt portion, the left front belt portion, the right front triangular portion, the left front triangular portion, the right triangular portion, the left triangular portion, the right hexagonal portion, and the left hexagonal portion. a portion, a first back central portion, a right rear band portion, a left rear band portion and a second back central portion;
The front central portion, the right front band portion, the left front band portion, the right front triangular portion, the left front triangular portion, the right triangular portion, the left triangular portion, the right hexagonal portion, the left hexagonal portion, and the Parts other than the first rear center portion, the right rear band portion, the left rear band portion, and the second rear center portion are knitted by the first knitting method,
The central front portion is arranged corresponding to the rectus abdominis muscle of the wearer,
The right front band portion is arranged corresponding to the groin of the wearer,
The left front belt portion is arranged corresponding to the groin of the wearer,
The right anterior triangle is arranged corresponding to the wearer's internal oblique muscle and iliopsoas muscle,
The left anterior triangle is arranged corresponding to the wearer's internal oblique muscle and iliopsoas muscle,
The right triangular portion is arranged corresponding to the vastus lateralis muscle and the gluteus maximus muscle of the wearer,
The left triangular portion is arranged corresponding to the vastus lateralis muscle and the gluteus maximus muscle of the wearer,
The right hexagonal portion is arranged corresponding to the gluteus medius muscle of the wearer,
The left hexagonal portion is arranged corresponding to the gluteus medius muscle of the wearer,
The first central back surface portion has an isosceles triangle shape, the vertex is directed downward, and the base is in contact with the center in the left-right direction of the upper edge of the main body,
The right rear band portion is arranged corresponding to the gluteus maximus muscle of the wearer,
The left rear band portion is arranged corresponding to the gluteus maximus muscle of the wearer,
The second back central portion is arranged corresponding to the sacroiliac joint of the wearer.
In the present invention,
the body portion has a front portion, a right portion, a left portion, and a rear portion;
The front portion is a portion covering the lower abdomen of the wearer,
The right side portion is a portion that is in close contact with the wearer from the right waist to the base of the right thigh,
The left side portion is a portion that is in close contact with the wearer from the left waist to the base of the left thigh,
The back portion is a band-shaped portion extending from the center of the wearer's waist in the left-right direction along the gluteal cleft,
The crotch portion is a portion that is in close contact with the wearer's crotch, the inside of the right thigh, and the inside of the left thigh,
The right side portion and the crotch portion are sutured in a tubular shape to form a right leg portion surrounding the base of the right thigh,
Preferably, the left side and the crotch are sewn together in a tubular shape to form a left leg surrounding the base of the left thigh.
In the present invention, it is preferable that the first knitting method is plain knitting and the second knitting method is floating knitting.

According to the present invention, a crotch portion is generally knitted in a first knitting method and has a first portion knitted in a second knitting method that is thicker than the first knitting method. ing. The first portion has a band shape and extends in the front-rear direction at the center of the crotch portion in the left-right direction. In this way, the first portion knitted by the second knitting method is thicker than the portion knitted by the first knitting method, so that the stimulation to the skin is relatively strong, and the first portion is the pelvis. It is arranged corresponding to the bottom muscle, and the stimulation acts on the pelvic floor muscle. Therefore, the wearer can effectively increase the amount of physical activity without feeling tightness.

1 is a front view of boxer shorts according to an embodiment of the present invention; FIG. Figure 2 is a rear view of the boxer shorts of Figure 1; 2 is a plan view of the boxer shorts of FIG. 1; FIG. Figure 2 is a bottom view of the boxer shorts of Figure 1; Figure 2 is a side view of the boxer shorts of Figure 1; FIG. 2 is a perspective view of the boxer shorts of FIG. 1 being worn; 2 is another perspective view of the boxer shorts of FIG. 1 being worn. FIG. FIG. 2 is a bottom view of the boxer shorts of FIG. 1 in a worn state; It is a figure explaining the crotch part of the boxer shorts of FIG. It is a figure explaining the measuring method of walking speed and the number of steps. It is a graph which shows the measurement result of walking speed. It is a graph which shows the measurement result of the number of steps. It is a figure explaining the measuring method of the amount of muscle activity at the time of a walk. 4 is a graph showing measurement results of muscle activity during walking. FIG. 10 is a diagram showing the rate of increase in muscle activity during walking in Example 1 with respect to Comparative Example 1; 4 is a graph showing measurement results of muscle activity during climbing stairs. FIG. 10 is a graph showing the rate of increase in muscle activity during climbing stairs in Example 1 compared to Comparative Example 1; 7 is a graph comparing the amount of muscle activity during climbing stairs according to Comparative Example 1 and the amount of muscle activity during walking according to Example 1. FIG. It is a figure explaining the measuring method of the muscle activity amount at the time of a squat. 4 is a graph showing measurement results of muscle activity during squats. FIG. 10 is a diagram showing the rate of increase in muscle activity during squat in Example 1 relative to Comparative Example 1; An example of an image taken for posture evaluation (evaluation on the sagittal plane) is shown. 10 is a graph showing measurement results of Posture 1 (the angle between the line connecting the ear lobe and the 7th cervical vertebra and the vertical line to the floor). 10 is a graph showing measurement results of Posture 6 (an angle formed by a meridian passing through the 7th cervical vertebra and the greater trochanter and a meridian passing through the greater trochanter and the lateral malleolus). It is a figure explaining a normal posture and a sway-back posture. An example of an image of a subject with a swayback finding in a standing posture is shown. It is a figure explaining a pelvic tilt angle. It is a graph which shows the measurement result of a pelvic tilt angle. It is a graph which shows the measurement result of abdominal pressure. It is a figure explaining the measuring method of muscle thickness of a lateral abdominal muscle group. 8 is a diagram showing an example of an ultrasound image of a subject wearing Comparative Example 1. FIG. FIG. 4 is a diagram showing an example of an ultrasound image of a subject wearing Example 1; It is a graph which shows the measurement result of muscle thickness of a lateral abdominal muscle group. It is a graph which shows the measurement result of SLR. It is a graph which shows the measurement result of HBD. It is a graph which shows the measurement result of long-sitting forward bending.

Human beings are always subjected to gravity from the earth, and perform actions such as standing up and walking against gravity in daily life. Such movements require maintaining good posture, flexibility of joints, and sufficient muscle strength.

Representative muscles for movement against gravity are, from the head side, abdominal muscles such as the erector spinae, rectus abdominis, iliopsoas, gluteus maximus, quadriceps, tibialis anterior, triceps surae ( gastrocnemius, soleus). Balanced work of these muscles enables a person to maintain a good standing posture. In addition, various muscles work in a well-balanced manner at appropriate timings, enabling stable walking while maintaining good posture.

Muscles are attached to bones across joints. A joint is the part where bones connect to each other. A joint can move in two or three directions: flexion-extension, adduction-abduction, internal rotation-external rotation, rather than only one-way movement like a door. By moving the joints in this way, a person can perform soft and supple movements. In order to achieve joint movement, it is necessary to stabilize the joint by wrapping it with a ligament containing a large amount of collagen fibers, and to ensure that the muscles straddling the joint work well.

Joints move as muscles contract and relax. Muscles not only move joints, but also work against gravity to maintain posture. Many blood vessels run through the muscles. To keep your muscles moving, you need to get more oxygen from your blood to your muscles. Muscles that consume a lot of oxygen have a high energy expenditure. The reason why exercise is effective for shaping up is that blood circulation functions in muscles. Muscles also act as blood pumps. Muscle contraction and relaxation complement the function of returning blood to the heart through the veins.

As mentioned above, muscles contract and relax. Muscles are attached to bones across joints. One end of the muscle is the origin and the other end is the stop. When the muscle contracts, the origin becomes the fixed point and the stop becomes the moving point. Usually, the starting part is positioned near the trunk, which is the central part of the body, and the pelvis (center side), and the stopping part is positioned on the terminal side such as the toes and fingers.

For many muscles, the width of the origin and the width of the insertion are not the same. For example, the gluteus medius, which is a representative muscle of the buttocks, has a large width at the origin on the pelvis side and a small width at the stop on the thighbone side. A muscle is an assembly of muscle fibers, and the directions of extension of the muscle fibers from the origin to the stop are various. In other words, a mass of muscle includes multiple types of muscle fibers extending in different directions. Muscles move according to the positional relationship between bones connected by joints.

Muscles contract and relax according to commands transmitted through nerves from the brain and spinal cord. Also, muscles contract and relax in response to stimuli transmitted from the skin. This mechanism involves tactile receptors in the epidermis and dermis of the skin. As touch receptors, the epidermis contains Merkel's disks and Meissner's corpuscles, and the dermis contains Pacinian corpuscles and Ruffini endings. These tactile receptors have different functions and play important roles in the body. Among the tactile receptors, the Ruffini endings have the function of being able to continuously perceive a pulling sensation along the surface of the skin. Through the function of Ruffini endings it is possible to produce changes in muscle activity.

The present invention applies the relationship between muscles and stimulation from the skin to the muscles around the pelvis to assist movements such as maintaining good posture and stable walking, and to improve the amount of physical activity and flexibility. It is.

Boxer shorts according to one embodiment of the underwear of the present invention will now be described with reference to FIGS. 1 to 9. FIG. The boxer shorts according to this embodiment are underwear for the lower body worn by men. It should be noted that the present invention is not limited to men's underwear, and may be underwear for the lower body worn by women.

1 to 5 are a front view, a rear view, a plan view, a bottom view and a side view of boxer shorts according to one embodiment of the present invention. FIG. 6 is a perspective view of the boxer shorts of FIG. 1 being worn. FIG. 7 is another perspective view of the boxer shorts of FIG. 1 being worn. FIG. 8 is a bottom view of the boxer shorts of FIG. 1 being worn. FIG. 9 is a diagram illustrating the crotch portion of the boxer shorts of FIG. 1. FIG. In FIG. 9, arrows labeled with the same sign (o, delta, x, =) have the same length. In this specification, the dimensions of M size boxer shorts are shown as representative dimensions, but the dimensions (including angles) of fabrics such as boxer shorts usually vary to some extent. .

As shown in FIGS. 1 to 8, the boxer shorts 1 according to this embodiment include a front portion 10, a right portion 20, a left portion 30, a back portion 40, a crotch portion 50, a waist band 60, have.

The front portion 10, the right portion 20, the left portion 30, the back portion 40, the crotch portion 50, and the waist band 60 are, for example, stretchable fabrics woven from synthetic fibers such as nylon and polyurethane.

The front part 10 is a part that covers the wearer's lower abdomen and male genitalia. The lower part of the front part 10 has a bulge projecting forward. In addition, the lower part of the front part 10 does not need to have a bulge. The right side portion 20 is a portion that is in close contact with the wearer from the right waist to the base of the right thigh. The left side portion 30 is a portion that is in close contact with the wearer from the left waist to the base of the left thigh. The right side portion 20 and the left side portion 30 are formed symmetrically. The back portion 40 is a band-shaped portion extending from the center of the waist along the gluteal cleft. The crotch portion 50 is a portion that comes into close contact with the wearer's crotch, the inside of the right thigh, and the inside of the left thigh.

The side edges of the front part 10, the upper side edges of the right side part 20, the upper side edges of the left side part 30, and the side edges of the back part 40 are sewn in a cylindrical shape to form a lower abdomen, male genitalia, A body portion 100 is formed to enclose the waist, buttocks, and the like. The upper edge of the body portion 100 (the upper edge of the front portion 10, the upper edge of the right portion 20, the upper edge of the left portion 30, and the upper edge of the back portion 40) is the lower edge of the annular waist band 60. sutured to the part. The suture point is indicated by symbol S.

The crotch portion 50 has a rectangular shape in the unfolded state before sewing. A lower edge portion of the front portion 10, a lower side edge portion of the right side portion 20, a lower side edge portion of the left side portion 30 and a lower edge portion of the back portion 40 are a front edge portion 50f corresponding to the long side of the crotch portion 50. and the trailing edge 50r. The lower side edges of the right side portion 20 are sewn to the front edge portion 50f and the rear edge portion 50r of the crotch portion 50 in a cylindrical shape to form a right leg portion 200 surrounding the base of the right thigh. A lower end portion of the right side portion 20 and a right end portion of the crotch portion 50 are folded inward and sewn to form a right skirt portion 210 . The lower side edges of the left side portion 30 are sewn to the front edge portion 50f and the rear edge portion 50r of the crotch portion 50 in a cylindrical shape to form a left leg portion 300 surrounding the base of the left thigh. A lower end portion of the left side portion 30 and a left end portion of the crotch portion 50 are folded inward and sewn to form a left skirt portion 310 .

The length of the crotch portion 50 in the left-right direction (long side length) is 155 mm±10 mm. The length of the crotch portion 50 in the front-rear direction (the length of the short side) is 120 mm±5 mm.

The crotch portion 50 is entirely knitted by flat knitting, and has a portion knitted by floating knitting. As used herein, "wholly plain knitted" means that more than 50% of the surface area is plain knitted. The crotch portion 50 is knitted by plain knitting except for the portion knitted by floating knitting. The crotch portion 50 has a central portion 51 , which is a portion knitted by float knitting, a right triangular portion 52 and a left triangular portion 53 .

In this embodiment, plain knitting is also called knitting, jersey knitting, or the like, and is the most basic knitting method. Float knitting is a knitting method that creates unevenness like ridges by skipping some stitches. Float knits are thicker than flat knits. Flat knits are smooth to the touch, and float knits may be rougher to the touch than flat knits. Plain knitting is the first type of knitting. Float knitting is a second type of knitting. If there is a difference in thickness or if there is a difference in texture, two knitting methods, which are different combinations of flat knitting and float knitting, may be adopted.

As shown in FIGS. 8 and 9, the central portion 51 has a first portion 511 , a second portion 512 and a third portion 513 . The first portion 511 has a strip shape and extends in the front-rear direction from the front edge portion 50f to the rear edge portion 50r at the center of the crotch portion 50 in the left-right direction. The second portion 512 has a strip shape and extends from the front edge 50f to the rear edge 50r across the first portion 511. As shown in FIG. The third portion 513 has a strip shape and extends from the front edge portion 50f to the rear edge portion 50r by intersecting the first portion 511. As shown in FIG. The first portion 511 , the second portion 512 , and the third portion 513 intersect at a location (intersection location) at the center of the crotch portion 50 in the left-right direction and at the center in the front-rear direction. The central portion 51 is arranged corresponding to the pelvic floor muscles.

The first portion 511, the second portion 512 and the third portion 513 have the same width. In this embodiment, the widths of the first portion 511, the second portion 512 and the third portion 513 are 20 mm. The angle α1 between the first portion 511 and the second portion 512 is 45°. The angle α2 formed by the first portion 511 and the third portion 513 is 45°. The widths of the first portion 511, the second portion 512 and the third portion 513 are preferably 20 mm±5 mm. The angle α1 is preferably 45°±5°. The angle α2 is preferably 45°±5°. The dimensions and angles of the first portion 511, the second portion 512 and the third portion 513 are the same even if the size of the boxer shorts 1 is different.

The right leg triangular portion 52 has an isosceles triangular shape. The right leg triangular portion 52 is arranged in the center of the inner side of the right leg portion 200 in the front-rear direction. In other words, the right leg triangular portion 52 is arranged at the center of the crotch portion 50 in the front-rear direction. A bottom side 52a of the right leg triangular portion 52 is in contact with the upper edge of the right skirt portion 210 . In this embodiment, the length of the base 52a is 25 mm±5 mm. The length of the base 52a is preferably 1/3 or less of the length of the crotch portion 50 in the front-rear direction (within the range of Ra in FIG. 9). The vertex 52b of the right leg trigone 52 is directed to the intersection of the first portion 511, the second portion 512 and the third portion 513. As shown in FIG. The vertex 52b is spaced apart from the central portion 51 . The vertex 52b is located at the left end of the rightmost portion when the crotch portion 50 (specifically, the portion of the crotch portion 50 excluding the right skirt portion 210 and the left skirt portion 310) is divided into six equal parts in the horizontal direction. are placed. The vertex 52b is preferably arranged between the left end point and the middle point between the left end point and the central portion 51 (within the range of Rb in FIG. 9). The right leg deltoid 52 is arranged corresponding to the adductor brevis muscle.

The left triangular portion 53 has an isosceles triangular shape. The left leg triangular portion 53 is arranged in the center of the inner side of the left leg portion 300 in the front-rear direction. In other words, the left triangular portion 53 is arranged at the center of the crotch portion 50 in the front-rear direction. A bottom side 53 a of the left triangular portion 53 is in contact with the upper edge of the left skirt portion 310 . In this embodiment, the length of the base 53a is 25 mm±5 mm. The length of the base 53a is preferably 1/3 or less of the length of the crotch portion 50 in the front-rear direction (within the range of La in FIG. 9). A vertex 53 b of the left leg trigone 53 is directed to the intersection of the first portion 511 , the second portion 512 and the third portion 513 . The vertex 53b is spaced apart from the central portion 51 . The vertex 53b is located at the right end of the leftmost portion when the crotch portion 50 (specifically, the portion of the crotch portion 50 excluding the right skirt portion 210 and the left skirt portion 310) is divided into six equal parts in the horizontal direction. are placed. The vertex 53b is preferably arranged between the right end point and the middle point between the right end point and the central portion 51 (within the range of Lb in FIG. 9). The left triangular part 53 is arranged corresponding to the adductor brevis muscle. The right triangular portion 52 and the left triangular portion 53 have symmetrical shapes.

In this embodiment, the central portion 51 has the first portion 511 , the second portion 512 and the third portion 513 , but it is sufficient that it has at least the first portion 511 . Moreover, the right leg triangular portion 52 and the left leg triangular portion 53 may be omitted, and in this case, the crotch portion 50 may be configured only by a portion that is in close contact with the wearer's crotch.

The waist band 60 has an annular shape. The waist band 60 is knitted by rubber knitting having higher elasticity than plain knitting or floating knitting. The width of the waist band 60 is 40 mm±5 mm.

The main body part 100 is entirely knitted by flat knitting, and has a portion knitted by floating knitting. The body part 100 is knitted by plain knitting except for the part knitted by floating knitting. The body portion 100 includes a front central portion 111, a right front belt portion 112, a left front belt portion 113, a right front triangular portion 114, a left front triangular portion 115, a right triangular portion 116, and a left side, which are portions (fourth portions) knitted by float knitting. It has a triangular portion 117 , a right hexagonal portion 118 , a left hexagonal portion 119 , a first rear central portion 121 , a right rear band portion 122 , a left rear band portion 123 and a second rear central portion 124 .

The front central portion 111 has a home base shape. The upper end of the central front portion 111 is in contact with the lower edge of the waist band 60 . The front central part 111 is arranged corresponding to the rectus abdominis muscle.

The right front belt portion 112 has a linear belt shape. The right front belt portion 112 extends from the front edge portion 50f of the crotch portion 50 to the upper portion of the right side portion 20 along the groin.

The left front belt portion 113 has a linear belt shape. The left front belt portion 113 extends from the front edge portion 50f of the crotch portion 50 to the upper portion of the left side portion 30 along the groin.

The right front triangular portion 114 is in contact with the front center portion 111 at an upper acute angle, and overlaps with the right front band portion 112 at an obtuse angle. The upper part of the right anterior trigone 114 is arranged corresponding to the internal oblique muscle. The lower part of the right anterior triangular part 114 is arranged corresponding to the iliopsoas muscle.

The left front triangular portion 115 is in contact with the front central portion 111 at an upper acute angle, and overlaps with the left front band portion 113 at an obtuse angle. The upper part of the left anterior trigone 115 is arranged corresponding to the internal oblique muscle. The lower part of the left anterior triangular part 115 is arranged corresponding to the iliopsoas muscle.

The right triangle 116 has an acute angle on the front side that meets an acute angle on the underside of the front right triangle 114 and an obtuse angle that meets the upper edge of the right skirt 210 . The anterior portion of the right trigone 116 is positioned to correspond to the vastus lateralis muscle. The rear part of the right triangular part 116 is arranged corresponding to the gluteus maximus muscle.

The left triangular portion 117 has an acute angle on the front side that contacts an acute angle on the lower side of the left front triangular portion 115 and an obtuse angle that contacts the upper edge of the left skirt portion 310 . The anterior portion of the left trigone 117 is positioned to correspond to the vastus lateralis muscle. The rear part of the left triangular part 117 is arranged corresponding to the gluteus maximus muscle.

The right hex 118 is connected to the upper end of the right front band 112 . The right hexagonal portion 118 is arranged corresponding to the gluteus medius muscle.

The left hexagonal portion 119 is connected to the upper end of the left front band portion 113 . The left hexagonal portion 119 is arranged corresponding to the gluteus medius.

The first rear central portion 121 has a downward isosceles triangular shape. The bottom side of the first rear central portion 121 is in contact with the lower edge of the waist band 60 . The vertex of the first rear central portion 121 faces downward.

The right rear band portion 122 has an arc band shape. The right rear band portion 122 extends from the rear edge portion 50r of the crotch portion 50 to the center of the right side portion 20 in the vertical direction. The right rear band 122 is contacted by an acute angle on the back side of the right triangle 116 . The right rear belt portion 122 is arranged corresponding to the gluteus maximus muscle.

The left rear band portion 123 has an arc band shape. The left rear band portion 123 extends from the rear edge portion 50r of the crotch portion 50 to the center of the left side portion 30 in the vertical direction. The left rear band portion 123 is in contact with the acute angle on the back side of the left triangular portion 117 . The left rear band portion 123 is arranged corresponding to the gluteus maximus muscle.

The second rear center portion 124 has a Y shape. The upper end of the second rear central portion 124 contacts the lower edge of the waist band 60 . A lower end portion of the second rear central portion 124 is in contact with the rear edge portion 50 r of the crotch portion 50 . The second back central portion 124 is arranged corresponding to the sacroiliac joint.

The waist width of the boxer shorts 1 is 320 mm±20 mm. The armpit length of the boxer shorts 1 is 270 mm±10 mm. The leg opening width of the boxer shorts 1 is 230 mm±10 mm. The width of the right skirt portion 210 is 30 mm±5 mm. The width of the left skirt 310 is 30 mm±5 mm. The above waist width, side length, and leg width are for the boxer shorts 1 of size M. The S-size boxer shorts 1 have a waist width of 300 mm±20 mm, a side length of 250 mm±10 mm, and a leg width of 215 mm±10 mm. The L-size boxer shorts 1 have a waist width of 340 mm±20 mm, an armpit length of 290 mm±10 mm, and a leg opening width of 245 mm±10 mm. The LL size boxer shorts 1 have a waist width of 360 mm±20 mm, a side length of 310 mm±10 mm, and a leg width of 260 mm±10 mm. The 3L size boxer shorts 1 have a waist width of 380 mm±20 mm, a side length of 330 mm±10 mm, and a leg width of 275 mm±10 mm.

The boxer shorts 1 according to this embodiment are formed by stitching a front portion 10, a right portion 20, a left portion 30, a back portion 40, a crotch portion 50 and a waist band 60 together. Alternatively, the boxer shorts 1 may be formed by knitting the front portion 10, the right portion 20, the left portion 30, the back portion 40, the crotch portion 50, and the waist band 60 integrally and three-dimensionally.

As described above, the boxer shorts 1 according to the present embodiment are underwear for the lower body that is in close contact with the wearer's skin. The crotch portion 50 of the boxer shorts 1 is entirely knitted by flat knitting, and has a first portion 511 knitted by floating knitting which is thicker than plain knitting. The first portion 511 has a belt shape and extends in the front-rear direction at the center of the crotch portion 50 in the left-right direction. Because of this configuration, the first portion 511 knitted with float knitting in the crotch portion 50 is thicker than the portion knitted with flat knitting, so that stimulation to the skin is relatively strong, and the first portion 511 is attached to the pelvis. It is arranged corresponding to the bottom muscle, and the stimulation acts on the pelvic floor muscle. Therefore, the wearer can effectively increase the amount of physical activity without feeling tightness.

In addition, the crotch portion 50 has a band-shaped second portion 512 knitted with a float and a band-shaped third portion 513 knitted with a float. The first portion 511, the second portion 512, and the third portion 513 intersect at one intersection point. By doing so, more stimulation is applied to the pelvic floor muscles. Therefore, the wearer can more effectively increase the amount of physical activity without feeling tightness.

The boxer shorts 1 also include a body portion 100 surrounding at least the lower abdomen, waist and buttocks of the wearer, a right leg portion 200 surrounding the base of the right thigh of the wearer, and a base of the left thigh of the wearer. and a left leg 300 enclosing the . The right leg 200 has a right leg triangle 52 knitted with a float. The left leg 300 has a left leg triangle 53 knitted with a float. A right leg trigone 52 is positioned corresponding to the inside of the wearer's right thigh root. A left leg trigone 53 is arranged corresponding to the inner side of the wearer's left thigh base. The vertex 52b of the right leg triangle 52 faces the intersection, and the vertex 53b of the left leg triangle 53 faces the intersection. As a result, the right trigone 52 is arranged to correspond to the adductor brevis muscle of the wearer's right leg, and the left trigone 53 corresponds to the adductor brevis muscle of the wearer's left leg. The skin is placed on the skin, and stimulation from the skin acts on these adductor brevis muscles. Therefore, the wearer can more effectively increase the amount of physical activity without feeling tightness.

Further, the main body portion 100 is entirely knitted by flat knitting, and includes a front central portion 111, a right front belt portion 112, a left front belt portion 113, a right front triangular portion 114, a left front triangular portion 115, and a front central portion 111 knitted by floating knitting. A right triangular portion 116, a left triangular portion 117, a right hexagonal portion 118, a left hexagonal portion 119, a first rear central portion 121, a right rear band portion 122, a left rear band portion 123 and a second rear central portion 124. there is These portions correspond to the wearer's rectus abdominis muscle, internal oblique muscle, iliopsoas muscle, gluteus medius muscle, vastus lateralis muscle, sacroiliac joint, gluteus maximus muscle and groin. By doing so, stimulation from the skin acts on these muscles. Therefore, the wearer can more effectively increase the amount of physical activity without feeling tightness.

Next, the boxer shorts according to the present invention and the commercially available boxer shorts for comparison were worn by subjects, and an experiment was conducted to confirm various effects. The details and results of the experiment are described below.

Example 1 is the boxer shorts 1 according to the example described above. Comparative Example 1 is commercially available boxer shorts (manufactured by Uniqlo). Comparative Example 1 has substantially the same outer shape as Example 1, and the main body, right leg and left leg (including the crotch portion) are formed of plain knitted fabric. .

Subjects wearing Example 1 and Comparative Example 1 were subjected to the following experiment. For each subject, the order of wearing Example 1 and Comparative Example 1 was randomly determined using a random number table.
(1) Walking (2) Muscle activity (3) Posture (4) Abdominal pressure (5) Muscle thickness of lateral abdominal muscles (6) Physical mobility (7) Sensory evaluation

Subjects were 26 healthy adult males with no locomotory disease in the pelvis or lower extremities. Specifically, the subjects were those who had no history of surgery for fractures of the pelvis and lower limbs and had a BMI of less than 30. Shown below are the age, height, weight, and average BMI value and variation range of the subjects.
Age (years old) 31.8±6.1
Height (cm) 172.8±4.8
Body weight (kg) 68.4±8.7
BMI (kg/ ^m2 ) 22.9±2.7

(1) Walking In this experiment, the walking speed and number of steps of the subjects were measured. As shown in FIG. 10, a 2-m run-up section was provided before and after the 5-m measurement section, and the walking speed and the number of steps during comfortable walking were measured for each subject. Measurement of walking speed begins when the subject's foot steps on the starting line or when the subject's foot crosses the starting line (including when the foot is not in contact with the floor). Measurement of walking speed is terminated when the subject's foot steps on the finish line or when the subject's foot crosses the finish line (including when the foot is not in contact with the floor). A subject's step over the start line and the heel in contact with the floor is counted as the first step. The step of the subject stepping on the finish line or the step of the subject last contacting the measurement section is counted as the final step. The walking speed and the number of steps were measured three times for each subject, and the average value of the three measurements was used as the measured value of the walking speed and the number of steps of the subject. The results are shown in FIGS. 11 and 12. FIG.

FIG. 11 shows the average walking speed measurements for each subject, and FIG. 12 shows the average step count measurements for each subject. The subjects wearing Comparative Example 1 had an average walking speed of 1.40 m/sec and an average number of steps of 8.1 steps. The subjects wearing Example 1 had an average walking speed of 1.43 m/sec and an average number of steps of 7.8 steps. Regarding Example 1 and Comparative Example 1, there was no significant difference in the number of steps and walking speed of the subjects. However, although slightly, the walking speed of the subject was improved and the stride length was longer in the case of wearing Example 1 than in the case of wearing Comparative Example 1.

(2) Muscle activity In this experiment, the amount of muscle activity during walking, climbing stairs, and squatting was measured. A wireless EMG sensor (manufactured by Logical Products, Inc.) was attached to the subject, and EMG waveforms of the gluteus medius, gluteus maximus, hamstring, and vastus medialis on the subject's dominant leg (the foot that usually kicks the ball) were acquired. . The sampling frequency of the electromyogram waveform was set to 1000 Hz. A LabVIE application (manufactured by Logical Products, Inc.) was used as an electromyographic waveform application.

(2-1) Walking As shown in FIG. 13, a 2-m run-up section was provided before and after the 5-m measurement section, and walking was performed at a tempo of 120 beats/min using a metronome. The electromyogram waveform of each muscle was rectified, and the integrated value was calculated for a period of 25 msec (50 msec period) before and after the peak value at the second step of the subject's dominant leg in the measurement section. Acquisition of an electromyogram waveform and calculation of an integral value were performed three times for each subject, and an average value was calculated. In the same way as for the average value, the acquisition of the electromyographic waveform and the calculation of the integral value were performed three times for each subject at the time of maximum contraction of each muscle, and the average value at the time of maximum contraction was calculated. A normalized value obtained by dividing the average value by the average value at the time of maximum contraction was used as the measurement value of the amount of muscle activity during walking of the subject. The results are shown in FIG.

FIG. 14 shows the average values of muscle activity measurements during walking for each subject. The average muscle activity of the subjects wearing Comparative Example 1 was 36.1 for the gluteus medius, 31.5 for the gluteus maximus, 25.5 for the hamstring, and 31.1 for the vastus medialis. Met. The average muscle activity of the subjects wearing Example 1 was 59.9 for the gluteus medius, 49.2 for the gluteus maximus, 46.6 for the hamstring, and 54.6 for the vastus medialis. was 7. This result indicates that the amount of muscle activity of the subject increased when wearing Example 1 compared to when wearing Comparative Example 1 in all muscles for which the amount of muscle activity was measured. As shown in FIG. 15, the rate of increase in muscle activity was 66.1% for the gluteus medius, 56.5% for the gluteus maximus, 82.5% for the hamstring, and 82.5% for the vastus medialis. It was 75.9%. When the garment of Example 1 is worn, the amount of muscle activity in the pelvis and lower limbs is about 1.7 times greater than when the garment of Comparative Example 1 is worn. From this, it is considered that walking while wearing Example 1 enables muscle maintenance and muscle strengthening.

It is said that men take an average of 6,794 steps per day, and walking 6,794 steps while wearing Example 1 is considered to be equivalent to walking about 11,500 steps. By wearing Example 1, there is a possibility that an exercise effect can be easily obtained even with a small number of steps. By wearing Example 1 and performing daily walking, the wearer can obtain a training effect while walking.

(2-2) Climbing Stairs Using a metronome, climbing stairs was performed at a tempo of 120 beats/min on 6 steps with a height difference of 20 cm. The electromyogram waveform of each muscle was rectified, and the integrated value was calculated for a period of 25 msec (50 msec period) before and after the peak value at the time of the second step on the subject's dominant leg. Acquisition of an electromyogram waveform and calculation of an integral value were performed three times for each subject, and an average value was calculated. In the same way as for the average value, the acquisition of the electromyographic waveform and the calculation of the integral value were performed three times for each subject at the time of maximum contraction of each muscle, and the average value at the time of maximum contraction was calculated. Then, a normalized value obtained by dividing the average value by the average value at the time of maximum contraction was used as the measurement value of the amount of muscle activity when the subject climbed stairs. The results are shown in FIG.

FIG. 16 shows the average measured values of muscle activity during stair climbing for each subject. The average muscle activity of the subjects wearing Comparative Example 1 was 62.3 for the gluteus medius, 50.2 for the gluteus maximus, 37.6 for the hamstring, and 135.5 for the vastus medialis. Met. The average muscle activity of the subjects wearing Example 1 was 105.9 for the gluteus medius, 83.0 for the gluteus maximus, 61.3 for the hamstring, and 262.0 for the vastus medialis. was 7. This result indicates that the amount of muscle activity of the subject increased when wearing Example 1 compared to when wearing Comparative Example 1 in all muscles for which the amount of muscle activity was measured. As shown in FIG. 17, the rate of increase in muscle activity was 70.0% for the gluteus medius, 65.5% for the gluteus maximus, 62.8% for the hamstring, and 62.8% for the vastus medialis. It was 93.8%. From this, it is considered that wearing Example 1 and climbing stairs enables muscle maintenance and muscle enhancement. By wearing Example 1 and trying to climb stairs every day, the wearer can obtain a training effect.

FIG. 18 shows a comparison between the average amount of muscle activity during climbing stairs of the subjects wearing Comparative Example 1 and the average amount of muscle activity during walking of the subjects wearing Example 1. In this comparison, no significant differences were found for muscles other than the vastus medialis. From this, by walking while wearing Example 1, substantially the same amount of muscle activity as climbing stairs while wearing Comparative Example 1 can be obtained. Therefore, by walking while wearing Example 1, the wearer is training the muscles around the buttocks and the back of the thighs in the same manner as climbing stairs.

(2-3) Squat As shown in FIG. 19, a table with a height of 50 cm was prepared, and using a metronome, squats were performed at a tempo of 60 beats/min. The squat was completed in 6 seconds, and the subject's buttocks were in contact with the platform at 3 seconds. The electromyographic waveform of each muscle was rectified, and the integrated value was calculated for 6 seconds from the start to the end of the squat. Acquisition of an electromyogram waveform and calculation of an integral value were performed three times for each subject, and an average value was calculated. In the same way as for the average value, the acquisition of the electromyographic waveform and the calculation of the integral value were performed three times for each subject at the time of maximum contraction of each muscle, and the average value at the time of maximum contraction was calculated. Then, a normalized value obtained by dividing the average value by the average value at the time of maximum contraction was used as the measurement value of the amount of muscle activity during squat of the subject. The results are shown in FIG.

FIG. 20 shows the average measured values of muscle activity during squat for each subject. The average muscle activity of the subjects wearing Comparative Example 1 was 1586.8 for the gluteus medius, 1331.6 for the gluteus maximus, 521.0 for the hamstring, and 3593.8 for the vastus medialis. Met. The average muscle activity of the subjects wearing Example 1 was 2255.9 for the gluteus medius, 1814.2 for the gluteus maximus, 821.9 for the hamstring, and 5940 for the vastus medialis. was 2. This result indicates that the amount of muscle activity of the subject increased when wearing Example 1 compared to when wearing Comparative Example 1 in all muscles for which the amount of muscle activity was measured. As shown in FIG. 21, the rate of increase in muscle activity was 42.2% for the gluteus medius, 36.2% for the gluteus maximus, 57.8% for the hamstring, and 57.8% for the vastus medialis. It was 65.3%. From this, it is considered that wearing Example 1 and performing squats enables muscle maintenance and muscle enhancement. By wearing Example 1 and repeatedly standing up from a sitting position as a daily action, the muscles can be maintained and strengthened, and the wearer can train through daily actions.

(3) Posture In this experiment, the posture of the subject was measured.
(3-1) Evaluation on the sagittal plane Subjects with attached markers were asked to take a stationary standing posture with both upper limbs in a drooping position and the foot angle was abducted by 10° to the left and right, and photographed with a digital camera (Olympus). Then, the photographed image was analyzed with an image application (ImageJ) to measure the subject's posture on the sagittal plane. The sites where the markers were attached were the earlobe, cervical vertebra #7 (C7), acromion lateral edge, greater trochanter, knee joint center and lateral condyle of the fibula. The distance between the digital camera and the subject was set to 2 m, and the center of the lens of the digital camera was aligned with the height of the greater trochanter, and the right half of the subject's body was photographed. FIG. 22 shows an example of the captured image.

[1] in FIG. 22 (hereinafter referred to as "posture 1") is the angle between the line connecting the earlobe and C7 and the vertical line to the floor. Posture 1 is the angle of the neck and is used to confirm a straight neck.
[2] in FIG. 22 (hereinafter referred to as "posture 2") is the angle between the line connecting the earlobe and the acromion and the line connecting the acromion and the greater trochanter. Posture 2 is used to check the position of the shoulders and the roundness of the shoulders.
[3] in FIG. 22 (hereinafter referred to as "posture 3") is the angle between the line connecting the acromion and the greater trochanter and the line connecting the greater trochanter and the center of the knee joint. Posture 3 is used to confirm the position of the hip joint and the position of the buttocks.
[4] in FIG. 22 (hereinafter referred to as "posture 4") is the angle between the line connecting the greater trochanter and the center of the knee joint and the line connecting the center of the knee joint and the lateral malleolus of the fibula. Posture 4 is the angle of the knees and is used to check the bending of the knees.
[5] in FIG. 22 (hereinafter referred to as "posture 5") is the angle between the line connecting the acromion and C7 and the vertical line to the floor. Posture 5 is used to confirm shoulder height and shoulder lift.
[6] in FIG. 22 (hereinafter referred to as "posture 6") is an angle formed by a meridian line passing through C7 and the greater trochanter and a meridian line passing through the greater trochanter and the lateral malleolus. Posture 6 is used to check the position of the pelvis and whether the posture has collapsed.

Postures 1 to 6 were measured three times for each subject, and the average value of the three measurements was used as the measurement value for postures 1 to 6 of the subject. The results are shown in FIGS. 23 and 24. FIG.

FIG. 23 shows the average measured values of posture 1 of each subject, and FIG. 24 shows the average measured values of posture 6 of each subject. The average value for Posture 1 of the subjects wearing Comparative Example 1 was 35.7°, and the average value for Posture 6 was 166°. The average value for posture 1 of the subjects wearing Example 1 was 33.4°, and the average value for posture 6 was 168°. When compared with the case of wearing Comparative Example 1, when Example 1 was worn, Posture 1 decreased and Posture 6 increased. From this, by wearing Example 1, there is a possibility that poor postures such as straight necks and swaybacks can be reduced, and good postures can be obtained.

A straight neck is a neck disorder in which seven cervical vertebrae line up in a straight line. Straight necks are often seen in people who work mainly at a desk, and their sitting and standing postures are poor. In addition, straight necks are often seen in so-called stooped people. A straight neck puts a constant strain on the neck, causing stiff shoulders, headaches, nausea, dizziness, and ringing in the ears. In addition, straight necks tend to put pressure on nerves, which can make your hands and arms feel numb and sluggish.

As shown in FIG. 25, swayback is a state in which the upper body is positioned (swayed) behind the lower body, and indicates a posture that looks like a bent waist and a stooped back. A swayback is one of the typical bad postures that occur in people with disorders in various parts of the body. FIG. 26 shows an example of a case where a subject with a finding of swayback in a standing posture wore Comparative Example 1 and a case where Example 1 was worn.

(3-2) Anterior pelvic tilt angle Subjects were asked to take a static standing posture with both upper limbs placed in front of the navel and the foot angle abducted by 10° to the left and right. and the line connecting the posterior superior iliac spine and the horizontal plane (Fig. 27, pelvic tilt angle) was measured. The pelvic tilt angle was measured three times for each subject, and the average value of the three measurements was taken as the measured value of the pelvic tilt angle of the subject. The results are shown in FIG.

FIG. 28 shows the average measured values of the pelvic tilt angle of each subject. The average pelvic tilt angle of the subjects wearing Comparative Example 1 was 6.6°. The average pelvic tilt angle of the subjects wearing Example 1 was 11.1°. The pelvic tilt angle increased when Example 1 was worn as compared to when Comparative Example 1 was worn. From this, it became clear that the pelvis tilted forward by wearing Example 1. An increase in the forward tilt of the pelvis has a positive effect on pelvic position due to changes in the activity of the lower extremity muscles and the abdominal muscles. In addition, it is conceivable that an increase in the forward tilt of the pelvis may be effective in preventing and improving discomfort in the lower back and lower back pain, in addition to acquiring good posture and improving performance.

(4) Abdominal pressure In this experiment, the subject's abdominal pressure was measured. The subject was asked to take a resting standing posture, and the abdominal pressure was measured using a trunk training device (RECORE, manufactured by SIGMAX). The abdominal pressure was measured three times for each subject, and the average value of the three measurements was taken as the measured abdominal pressure of the subject. The results are shown in FIG.

FIG. 29 shows the average values of measured values of abdominal pressure for each subject. The average abdominal pressure of the subjects wearing Comparative Example 1 was 12.8 hPa. The average abdominal pressure of the subjects wearing Example 1 was 13.0 hPa. Regarding Example 1 and Comparative Example 1, no significant difference was observed in the measured abdominal pressure values of the subjects. However, regarding abdominal pressure, since it seems that the subject's proficiency in how to increase the abdominal pressure at the time of measurement is related, it is considered necessary to observe long-term changes.

(5) Muscle Thickness of Lateral Abdominal Muscle Group In this experiment, the muscle thickness of the subject was measured. As shown in FIG. 30, the subject is asked to take a resting standing posture, and an ultrasonic image is taken using an ultrasonic device (miruco, manufactured by SIGMAX). Based on the ultrasonic image, the thickness of the external oblique muscle ( Symbol a), internal oblique muscle thickness (symbol b) and transversus abdominis muscle thickness (symbol c) were measured. The imaged location was below the center between the 11th rib and the iliac crest on the right anterior axillary line, where the muscle thickness can be most clearly depicted. FIG. 31 shows an example of an ultrasound image of a subject wearing Comparative Example 1, and FIG. 32 shows an example of an ultrasound image of a subject wearing Example 1. As shown in FIG. The thickness of the external oblique muscle, the thickness of the internal oblique muscle, and the thickness of the transversus abdominis muscle were measured three times for each subject, and the average value of the three measurements was the thickness of the external oblique muscle of the subject. , the thickness of the internal oblique muscle and the thickness of the transversus abdominis muscle. The sum of the thickness of the external oblique muscle, the thickness of the internal oblique muscle and the thickness of the transversus abdominis muscle (total of three muscles) was calculated. The results are shown in FIG.

FIG. 30 shows the average measured value of the thickness of the external oblique muscle, the average value of the measured value of the internal oblique muscle, and the average value of the measured value of the thickness of the transversus abdominis muscle of each subject. The average value of the total of 3 muscles is shown. The average muscle thickness of the subjects wearing Comparative Example 1 was 0.84 cm for the external oblique muscle, 1.11 cm for the internal oblique muscle, and 0.42 cm for the transversus abdominis muscle. The total is 2.37 cm. The average muscle thickness of the subjects wearing Example 1 was 0.87 cm for the external oblique muscle, 1.14 cm for the internal oblique muscle, and 0.52 cm for the transversus abdominis muscle. The total is 2.53 cm. The thickness of the transversus abdominis muscle and the total of the three muscles increased in the case of wearing Example 1 compared to the case of wearing Comparative Example 1. The increase in muscle thickness is thought to be due to increased muscle activity. By wearing Example 1, the amount of activity of the abdominal muscle group is improved, and it is considered that a favorable posture is obtained, the amount of muscle activity of the lower extremities is improved, and the performance is improved.

The transversus abdominis is one of the inner muscles of the abdominal muscle group and is located at the bottom. The transversus abdominis works as a respiratory muscle in cooperation with the diaphragm when exhaling. The transversus abdominis, which wraps around the abdomen, acts as a corset and stabilizes the trunk. By increasing the thickness of the transversus abdominis muscle, it has the effects of increasing abdominal pressure, assisting defecation, preventing urinary incontinence, and reducing the burden on the lower back. The inner unit is a general term for the diaphragm, transversus abdominis, multifidus, and pelvic floor muscles, and forms the abdominal cavity. The inner unit is the part called the core, and these muscles work together to control the stability and movement of the body. The inner unit is the part that moves first when a person makes an action, and can be said to be the core of the action. When the activity of the inner unit declines, symptoms and disorders may appear in the human body.

(6) Body mobility In this experiment, the body mobility (body softness) of the subject was measured.
(6-1) Straight Leg Raising (SLR)
Have the subject assume a supine position on the floor, place the practitioner's hand on the subject's heel, and lift the leg while keeping the subject's knee extended. Leg lift is stopped when the subject complains of pain or resistance to hip flexion increases. At this time, the angle between the floor and the leg (lifting angle) was measured. The lifting angle was measured three times for each subject, and the average value of the three measurements was taken as the measured lifting angle of the subject. The results are shown in FIG.

FIG. 34 shows the average values of the lift angle measurements for each subject. The average lifting angle of the subjects wearing Comparative Example 1 was 45.2°. The average lifting angle of the subjects wearing Example 1 was 56.5°.

(6-2) Heel Buttock Distance (HBD)
The subject is placed in a prone position on the floor, hands are placed on the buttocks and ankles of the subject, and the heels of the subject are gradually brought closer to the buttocks to bend the knee joints. Flexion is stopped when the subject complains of pain or when resistance to flexion of the knee joint increases. The distance between the buttocks and the heel at this time was measured. The distance between the hip and the heel was measured three times for each subject, and the average value of the three measurements was taken as the measured value of the distance between the hip and the heel of the subject. The results are shown in FIG.

FIG. 35 shows the average measured value of the hip-to-heel distance for each subject. The average value of the distance between the buttocks and heels of the subjects wearing Comparative Example 1 was 19.8 cm. The average value of the distance between the buttocks and heels of the subjects wearing Example 1 was 14.3 cm.

(6-3) Long sitting forward bending Have the subject take a long sitting position on the floor, stretch both hands forward and bend the upper body forward. The long sitting forward bending distance was measured as a minus. The long sitting forward bending distance was measured three times for each subject, and the average value of the three measurements was taken as the measured value of the long sitting forward bending distance of the subject. The results are shown in FIG.

FIG. 36 shows the average measured values of the long sitting forward bending distance of each subject. The average value of the long sitting forward bending distance of the subjects wearing Comparative Example 1 was -1.3 cm. The average value of the long sitting forward bending distance of the subjects wearing Example 1 was -0.1 cm.

From the above results, the body flexibility of the subject was improved in the case of wearing Example 1 compared to the case of wearing Comparative Example 1. It is thought that the pelvic girdle muscle group has good muscle tone and flexibility due to the contact of the float knitted part with the skin. Flexibility around the hip joint is associated with low back pain and knee pain, so it can be expected to reduce and prevent pain, and also improve performance.

(7) Sensory Evaluation In this experiment, the ease of wearing and the ease of movement felt by the subjects were evaluated.
(7-1) Ease of wearing 16 out of 26 test subjects felt that Example 1 was easier to wear than Comparative Example 1, 3 felt that Example 1 was more difficult to wear than Comparative Example 1, and 7 people. However, it was felt that Example 1 and Comparative Example 1 did not differ in ease of wear.

(7-2) Ease of movement.
18 out of 26 subjects felt that Example 1 was easier to move than Comparative Example 1, 2 felt that Example 1 was harder to move than Comparative Example 1, and 6 people felt that Example 1 and Comparative Example 1 were more difficult to move. I felt that the ease of movement did not change.

As is clear from the results of (1) to (7), the boxer shorts 1 according to the present invention have the effect of effectively increasing the amount of physical activity without feeling tightness in the body.

In this specification, each term indicating a shape such as "strip shape", "triangle", "hexagon" is also used for a member substantially having the shape of the term. For example, a "strip-shaped portion" includes a strip-shaped portion and a substantially strip-shaped portion.

Although embodiments of the present invention have been described above, the present invention is not limited to the embodiments. A person skilled in the art may add, delete, or change the design of the above-described embodiments as appropriate, or combine the features of the embodiments as appropriate, as long as they do not conflict with the spirit of the present invention. included in the range of

DESCRIPTION OF SYMBOLS 1... Boxer shorts 10... Front part 20... Right part 30... Left part 40... Back part 50... Crotch part 50f... Front edge part 50r... Rear edge part 51... Central part 511... Third part Part 1 512...Second part 513...Third part 52...Right leg triangle 52a...Base 52b...Vertex 53...Left leg triangle 53a...Base 53b...Vertex 60...Waist band, REFERENCE SIGNS LIST 100 Main body 111 Front central part 112 Right front belt 113 Left front belt 114 Right front triangle 115 Left front triangle 116 Right triangle 117 Left triangle 118 Right side Hexagonal portion 119 Left hexagonal portion 121 First back center portion 122 Right rear band portion 123 Left rear band portion 124 Second back center portion 200 Right leg 210 Right hem , 300... left leg, 310... left hem

Claims (3)

Underwear for the lower body that is in close contact with the wearer's skin,
a body portion surrounding at least the wearer's lower abdomen, waist, and buttocks; and a crotch portion;
the crotch portion having a central portion, a right leg trigone and a left trigone;
Parts of the crotch portion other than the central portion, the right triangular portion and the left triangular portion are knitted by a first knitting method ,
The central portion, the right triangular portion and the left triangular portion are knitted by a second knitting method having a thickness greater than that of the first knitting method,
The central portion has a belt shape and extends in the front-rear direction at the center of the crotch portion in the left-right direction , a second portion having a belt shape, and a third portion having a belt shape; has
The first portion, the second portion, and the third portion intersect at one intersection,
The right trigone part is arranged corresponding to the inner side of the root of the wearer's right thigh,
The left trigone part is arranged corresponding to the inner side of the base of the left thigh of the wearer,
the vertex of the right leg trigone faces the intersection;
the vertex of the left leg trigone faces the intersection;
The main body is knitted by the second knitting method, the central front portion, the right front belt portion, the left front belt portion, the right front triangular portion, the left front triangular portion, the right triangular portion, the left triangular portion, the right hexagonal portion, and the left hexagonal portion. a portion, a first back central portion, a right rear band portion, a left rear band portion and a second back central portion;
The front central portion, the right front band portion, the left front band portion, the right front triangular portion, the left front triangular portion, the right triangular portion, the left triangular portion, the right hexagonal portion, the left hexagonal portion, and the Parts other than the first rear center portion, the right rear band portion, the left rear band portion, and the second rear center portion are knitted by the first knitting method,
The central front portion is arranged corresponding to the rectus abdominis muscle of the wearer,
The right front band portion is arranged corresponding to the groin of the wearer,
The left front belt portion is arranged corresponding to the groin of the wearer,
The right anterior triangle is arranged corresponding to the wearer's internal oblique muscle and iliopsoas muscle,
The left anterior triangle is arranged corresponding to the wearer's internal oblique muscle and iliopsoas muscle,
The right triangular portion is arranged corresponding to the vastus lateralis muscle and the gluteus maximus muscle of the wearer,
The left triangular portion is arranged corresponding to the vastus lateralis muscle and the gluteus maximus muscle of the wearer,
The right hexagonal portion is arranged corresponding to the gluteus medius muscle of the wearer,
The left hexagonal portion is arranged corresponding to the gluteus medius muscle of the wearer,
The first central back surface portion has an isosceles triangle shape, the vertex is directed downward, and the base is in contact with the center in the left-right direction of the upper edge of the main body,
The right rear band portion is arranged corresponding to the gluteus maximus muscle of the wearer,
The left rear band portion is arranged corresponding to the gluteus maximus muscle of the wearer,
A lower-body undergarment , wherein the second back central portion is arranged corresponding to the sacroiliac joint of the wearer . the body portion has a front portion, a right portion, a left portion, and a rear portion;
The front portion is a portion covering the lower abdomen of the wearer,
The right side portion is a portion that is in close contact with the wearer from the right waist to the base of the right thigh,
The left side portion is a portion that is in close contact with the wearer from the left waist to the base of the left thigh,
The back portion is a band-shaped portion extending from the center of the wearer's waist in the left-right direction along the gluteal cleft,
The crotch portion is a portion that is in close contact with the wearer's crotch, the inside of the right thigh, and the inside of the left thigh,
The right side portion and the crotch portion are sutured in a tubular shape to form a right leg portion surrounding the base of the right thigh,
2. The lower body undergarment according to claim 1 , wherein the left side portion and the crotch portion are sewn together in a tubular shape to form a left leg portion surrounding the base of the left thigh . The first knitting method is plain knitting,
3. The lower body undergarment according to claim 1 or 2, wherein the second knitting method is float knitting.

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