JP5501337B2 - Strength training equipment - Google Patents

Description

  The present invention relates to a strength training device used for exercising while restricting venous return by a cuff to enhance the strength of extremities.

  In a state where the tightening force that restricts venous return is applied to the muscles of the extremities to be strengthened on the side close to the heart of the muscles, by exercising and causing fatigue in the muscles in a short time, 2. Description of the Related Art Strength training methods that efficiently increase muscle strength have been practiced.

  As a conventional strength training method, a tightening tool for applying a tightening force to a muscle is wound around the side of the muscle near the heart, and the circumference of the tightening tool is reduced to inhibit the blood flow flowing to the muscle. Japanese Patent Application Laid-Open No. 2004-151867 discloses a method of causing fatigue in a muscle by applying a load to the muscle in a state.

  As a conventional device that inhibits blood flow to muscles, a venous return restriction cuff with a rubber tube in a bag-shaped belt is used, and this cuff is wrapped around the limb muscle near the heart. In the state where it is attached and fixed, the following patent document discloses that the rubber tube moves by restricting venous return by applying a tightening force by generating pressurized pressure by generating pressurized air. 2 is disclosed.

Japanese Patent No. 2670421 Japanese Patent No. 2796276

  In the tightening tool for applying a tightening force to the muscle disclosed in Patent Document 1, the tightening degree is adjusted by winding the tightening tool around a portion of the extremity close to the heart at the start of training.

  The venous return restriction cuff disclosed in Patent Document 2 includes a rubber tube. At the start of training, the venous return restriction cuff is wrapped around a portion of the limb near the heart and pressurized air is put into the rubber tube. While measuring the internal pressure of the rubber tube, the measured value is set corresponding to the tightening force.

  Even if the tightening degree of the tightening tool is initially set or the internal pressure of the rubber tube is set to the initial value, if the tightening tool or the venous return restriction cuff is wound around the extremities and bent and stretched, for example, the arm is bent. In some cases, the area around which the fastener or the venous return restriction cuff is wound becomes thicker and the cross-sectional area becomes larger so that the muscle contracts and can make a bicep.

  According to the training method using tightening tools, every time the extremities are bent, the portion around which the tightening tools are wrapped tends to become thicker. Be ischemic.

  Also, in the training method using the venous return restriction cuff, each time the limb is bent, the portion around which the venous return restriction cuff is wound becomes thicker, the rubber tube is compressed, and the volume decreases, so the rubber tube The internal pressure of the muscle rises and the flexed limbs are strongly tightened, causing the muscles to become ischemic.

  Thus, even if the tightening degree of the venous return restriction cuff is initially set based on the internal pressure of the rubber tube, the pressing force that presses the skin surface of the limb changes every time the limb is bent and stretched, It does not correspond to the limit rate.

  If the muscular interior becomes ischemic each time the limb is bent, the trainee may experience pain symptoms and may have to stop training midway.

  Therefore, the muscle strength training device of the present invention was conceived for reducing fluctuations in the internal pressure of the rubber tube based on the bending and stretching movements of the limbs in the venous return restriction cuff provided with the conventional rubber tube.

  The strength training device of the present invention has a cloth tube that does not easily stretch, a rubber tube that is shorter than the cloth tube inserted in the middle of the cloth tube, and a fixing means that fixes both ends of the cloth tube to form a loop. A venous return restriction cuff that tightens the region close to the heart of the muscle from the surroundings, a surge tank that communicates with the venous return restriction cuff through a thin tube, and a pressure that sends air to the venous return restriction cuff and the surge tank The surge tank has a volume larger than that of the rubber tube.

  According to the strength training device of the present invention, a venous return restriction cuff provided with a rubber tube is wrapped around a portion of the limb close to the heart, and the pressure of the rubber tube is set before starting training to restrict venous return. Even with bending and stretching movements, by providing a large volume surge tank that communicates with the rubber tube, fluctuations in the internal pressure of the rubber tube due to bending and stretching movements can be reduced, and a constant clamping force can be applied at all times. it can.

It is a schematic diagram partially showing a cross-sectional view of an embodiment of the strength training device of the present invention, It is the side view (a) which shows an example of the venous return restriction cuff used in the muscular strength training tool of this invention, a top view (b), and a top view (c) which shows the state where air was put in and inflated with the rubber tube.

  As shown in FIG. 1, the strength training device of the present invention includes a venous return restriction cuff 1 having a rubber tube 12 wound around the side of the limb to be strengthened near the heart, and a rubber tube 12 of the cuff 1. The surge tank 3 is in communication with the rubber pump 12 and the pressure pump 4 is provided with a pressure gauge 41 that puts and removes pressurized air into and from the surge tank 3.

  As shown in a side view (a) and a plan view (b) of FIG. 2, the venous return restriction cuff 1 used in the strength training device of the present invention has a cloth tube 11 that does not easily expand and contract, and an intermediate portion of the cloth tube 11. After the rubber tube 12 is inserted into the fabric tube 11, both ends of the fabric tube 11 are closed by seams 13 to form a flat portion 15. The flat portion 15 is attached with fixing means composed of hook surfaces 16A and loop surfaces 16B of Velcro (registered trademark) for fixing both ends of the fabric tube 11 to form a loop.

  In the venous return restriction cuff 1 of the present invention, the length of the rubber tube 12 is set to be shorter than the length of the fabric tube 11, so that air is passed through the rubber tube 12 in a state where the loop is not formed by the fabric tube 11. When inserted and inflated, the rubber tube 12 is rod-shaped and accommodated in the cloth tube 11 as shown in the plan view (c) of FIG.

  After wrapping the venous return restriction cuff 1 with no air into the rubber tube 12 around the base of the limb and fixing both ends of the fabric tube 11 with fixing means 16A, 16B to form a loop, the rubber tube 12 Since the length of the inner circumference (the part in contact with the skin) of the fabric tube 11 and the length of the outer circumference (the outer part) of the fabric tube 11 are almost the same, the fabric tube 11 not in contact with the skin The outer circumferential length of the can hardly extend and is limited.

  However, since the length of the inner circumference of the fabric tube 11 in contact with the skin has a margin, the rubber tube 12 swells inwardly and is wound as shown in a partial cross section in FIG. The limbs can be tightened to limit venous return.

  The rubber tube 12 of the venous return restriction cuff 1 is connected to a surge tank 3 and a coupler 5 having a check valve through a thin tube 21 and a branch plug 2. The rubber tube 12 and the surge tank 3 always communicate with each other through the thin tubes 21 and 23 and the branch plug 2.

  The coupler 5 connects and removes the pressure pump 4 equipped with the pressure gauge 41, and supplies air to the rubber tube 12 and the surge tank 3 through the branch plug 2 and the thin tubes 22 and 24. After inserting, the pressurizing pump 4 is removed from the coupler 5 and training is performed. At the end of training, the coupler 5 is coupled again, and the exhaust valve (not shown) of the pressurizing pump 4 is opened to remove air.

  The surge tank 3 has a larger volume than that of the rubber tube 12, and is provided to level the excessive pressure change of the rubber tube 12, and is lightweight and obstructs during training. Any material and shape that does not become a material may be used.

  As the surge tank 3, for example, a synthetic resin fiber cloth formed in a bag shape and coated with latex is suitable as the surge tank. Since the volume of the tank is limited by the cloth of the synthetic resin fiber, even if the pressure is applied, the fixed volume does not further swell and increase, but only the pressure increases. And when not in use, it can be folded thinly by removing the air. In addition, a lightweight container such as a PET bottle may be used as the surge tank 3.

  The pressurizing pump 4 is composed of a rubber air balloon 42, a pressure gauge 41, and an exhaust valve (not shown), and operates to grasp and release the air balloon 42 with the exhaust valve closed. By repeating, pressurized air is sent into the rubber tube 12 and the surge tank 3, and the pressure in the rubber tube 12 and the surge tank 3 at that time is displayed by a pressure gauge 41.

  As shown in FIG. 1, the length of the rubber tube 12 is set to be shorter than the length of the cloth tube 11, as shown in FIG. 1, and the cloth tube into which the rubber tube 12 is inserted. Even if the loop is formed at 11, a portion of only the flat portion 15 of the cloth tube in which the rubber tube 12 does not exist in a part is formed.

  When the flat part 15 where the rubber tube 12 does not exist is wound around the inner forearm nerve of the upper arm or the outer femoral nerve of the thigh near the epidermis, the rubber tube 2 is present near the epidermis. It does not squeeze the nerves that do.

  The venous return restriction cuff 1 configured in this way restricts venous return and does not compress nerves even if exercise is performed to increase muscle strength of the extremities, so that the exercise can be continued without causing pain. it can.

  Next, a setting method for appropriately limiting venous return using the strength training device according to the present invention will be described.

  The venous return restriction cuff 1 from which the rubber tube 12 has been deflated is wound around the limb muscles near the heart and fixed by the fixing means 16A and 16B. At this time, the venous return restriction cuff 1 communicates with the surge tank 3 through the thin tubes 21 and 23 and the branch plug 2.

  The pressurizing pump 4 is coupled through a thin tube 24 to a coupler 5 having a check valve coupled to the branch plug 2 through a thin tube 22. Then, the operation of grasping / separating the air supply bulb 41 of the pressurizing pump 4 is repeated to send the pressurized air into the rubber tube 12 and the surge tank 3.

  When pressurized air is fed while looking at the pressure gauge 41, the pressure in the rubber tube 12 and the surge tank 3 rises, so when the pressure corresponding to the tightening force applied to the muscles reaches an appropriate value, The operation of the balloon 42 is stopped, the thin tube 24 is removed from the coupler 5 having a check valve, and the pressurizing pump 4 is disconnected. Then start training. At this time, since the coupler 5 is provided with a check valve, the air from the rubber tube 12 and the surge tank 3 does not escape during training.

  Assume that the volume of the rubber tube 12 maintained at an appropriate pressure p before the start of training is a, the volume of the surge tank 3 is b, and the decrease in the volume of the rubber tube 12 during training is Δa.

When training is performed using only the rubber tube 12 with the surge tank 3 removed, the pressure P ₁ of the rubber tube 12 is reduced due to the decrease in the volume Δa of the rubber tube 12.
P ₁ = p × a / (a−Δa)
And rises (P ₁ > p).

However, if the surge tank 3 having a remarkably large volume b (b >> a) is connected to and communicated with the volume a of the rubber tube 12 and is kept at an appropriate pressure p, the rubber tube will be used during training. Even if the volume a of 12 decreases by Δa, the pressure P ₂ of the rubber tube 12 and the surge tank 3 is
P ₂ = p × (a + b) / (a + b−Δa)
Thus, the increase in the pressure P ₂ based on the decrease in the volume of the rubber tube 12 can be remarkably reduced.

  Therefore, each time the limb is bent, the portion around which the venous return restriction cuff is wound becomes thicker, and even if the rubber tube 12 is compressed and the volume is reduced, the internal pressure of the rubber tube 12 hardly increases. The tightening degree by the reflux limit cuff does not change. Thereby, the disorder | damage | failure and pain by the ischemia inside the muscle by exercise | movement can be reduced.

1 venous return restriction cuff
11 Fabric tube
12 Rubber tube
13 stitches
15 Flat surface
16A, 16B Fixing means 2 Branch plug 3 Surge tank 4 Pressure pump
41 Pressure gauge
42 Balloon 5 Coupler

Claims (3)

A cloth tube that is difficult to stretch, a rubber tube that is shorter than the cloth tube inserted in the middle of the cloth tube, and a fixing means that fixes both ends of the cloth tube to form a loop, on the side close to the muscular heart A venous return restriction cuff that tightens the site from the surroundings;
A surge tank in communication with the venous return restriction cuff through a thin tube;
A venous return restriction cuff and a pressure pump for sending air to the surge tank,
A strength training device, wherein the volume of the surge tank is larger than the volume of the rubber tube.   The muscular strength training device according to claim 1, wherein the venous return restriction cuff and the surge tank and the pressure pump are coupled via a coupler having a check valve function.   The muscle strength training device according to claim 1, wherein the pressurizing pump includes a pressure gauge and an exhaust valve.

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