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US3100639A - Exerciser - Google Patents

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Publication number
US3100639A
US3100639A US10558161A US3100639A US 3100639 A US3100639 A US 3100639A US 10558161 A US10558161 A US 10558161A US 3100639 A US3100639 A US 3100639A
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Prior art keywords
platform
exerciser
weights
twisting
bar
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Everett D Bonewitz
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Everett D Bonewitz
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    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B22/00Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements
    • A63B22/14Platforms for reciprocating rotating motion about a vertical axis, e.g. axis through the middle of the platform
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2208/00Characteristics or parameters related to the user or player
    • A63B2208/02Characteristics or parameters related to the user or player posture
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2208/00Characteristics or parameters related to the user or player
    • A63B2208/12Characteristics or parameters related to the user or player specially adapted for children

Description

Aug- 13 1953 E. D. BoNEwl-rz 3,100,639

ExERcIsER Filed April 26, 1961 United States Patent 3,100,639 EXERCISER Everett D. Bonewit'z, 416 S. Davista Drive, Whittier, Calif. Filed Apr. 26, 1961, Ser. No. 105,581 2 Claims. (Cl. 272-57) This invention relates to exercisers and particularly to a type of exerciser including Ia pair of coaxially pivotally related disks equal in diameter, the lower disk resting on the floor and the upper disk comprising `a rotary platform on which a person stands to exercise. Fllhis type of exerciser has the advantage of being small in size and thus readily stowable, and provides a means of performing a spinal exercise of great value to the health of children and adults.

Exercise is most commonly taken lon this type of exerciser while standing upright on the exerciser platform and holding onto a heavy piece of furniture or a towel bar, or `a special exercising bar provided for the purpose. With the body held erect, the platform is lthen rotated by twisting the body throughout its length to rotate the platform as far as possible in one direction, after which the body is quickly twisted as far as it will go in the opposite direction. The platform rotates with the feet in each of these body twisting movements which are repeated as often as desired and with mene or less violence until the muscles used have been adequately exercised.

A number of exercisers of this general type have heretofore been developed which are distinguished from each other by their exhibiting ditferentmeans for frictionally retanding the rotation of the platform of the exerciser whereby a `greater eifort must lbe expended by the person using the device in order to rotate the platform. factor increases the rigor of the exercise and the development of the muscles used in it, and is a valuable addition to the simple device as originally made. However the retardation factor mentioned is constantly in opposition to Ithe effort applied lby the muscles of `the body in rotating the platform and is as great toward the end of a body twisting movement as at the beginning of this. Thus the ratio of muscular capacity to the retarding force resisting this twisting effort, greatly diminishes in the final portion of each twisting movement. This had the tendency of tightening up the muscles at the point of contraction.

-I have discovered that these netarding devices stand in the way of realizing the greatest benefits capable of being derived from this general Vtype of exeroiser. This discovery has led me to a conception by which an entirely new and highly beneficial effect may be obtained by -this mode of exercise.

It is an object of this invention to provide an exerciser 'of the type mentioned in which substantial forces are applied retarding the rotation of the platform at the initiation of each body twisting movement, and in which said forces are relaxed toward the end of each such movement.

Another object of the invention is to provide such an exerciser in which not only are said retarding forces withdrawn toward the end of each twisting movement, but substantial forces are applied to said platform at that time tending to cause continuation of the rotation of said platform `and thus stretch the muscles in opposition to those causing particular rotation of the body and apply an external twisting force to the spine at a time when the entire body is relaxed immediately following the exertion of rotating said platform, and th-us loosen up the joints between the vertebrae and relieve pressure applied to nerves passing out through said joints.

A further object of the invention is to provide such an exerciser in which the platform is connected with an inertia 3,100,639 Patented Aug. 13, 41963 ICC means which applies a substantial negative torque moment to the platform tending to inhibit acceleration of the platform at the beginning of a twisting movement by the person standing theneon, said inertia means being thus in vested with a substantial positive momentum tending to keep the platform rotating and thus giving an involuntary twist to the spine of the person using the exe=rciseratthe conclusion of each voluntary twisting movement.

Yet another object of the invention is to provide such an exerciser in which the inertia means is adjustable to vary the moment applied by such means to the platform of the exerciser, thereby adapting the exerciser for use by individuals varying substantially in age and strength.

PIlhe manner of accomplishing the foregoing objects as 'Well as further yobjects and advantages will be made inanifest in the following description taken in connection the accompanying drawings in which FIG. 1 isa perspective view of a preferred embodiment of the invention being used by a person standing thereon.

FIG. 2 is an enlarged plan view of said exercisei.

FIG. 3 is an enlarged cross-sectional viewtaken on the line 3--3 Aof FIG. 2i.

j FIG. 4 is an `enlarged detail sectional view taken on Athe line 4 4 of FIG. 3.

Referring specifically to the drawings, an exerciser y10 i-s shown therein which includes a base v1=1 and a platform 12 both of which are in the form of disks, .these being coaxially pivotally connected by a bolt 13.

The base 11 includes a wooden disk 14 which is bound by a metal ferrule 1S- and is supported on the floor 16 by four rubber feet 17 secured to the disk 14 by screws 1`8. 'Ilhe disk 14 has a central hole 19 and a metal plate 20 is secured by Iscrews 2'5- to the upper face of said disk, this plate being centrally apertured to receive the bolt 13.

The platfonm `12 includes ya wooden disk `2'6` covered with a sheet of ribbed rubber 27, both the disk 26- and the sheet `of rubber 27 being bound -by a metal ferrule 28. Formed centrally in the lower face of the disk 26 is la recess 29 for receiving the head 30 of a bolt 13, Secured lto the bottom face of disk 26 by screws 31 is a plate 32 which is cent1-ally apertured to receive the bolt 13, the head 30 of said bolt being Welded to said plate. Also centnally apertured to receive the bolt 13 and occupying the space between plates 20 and 32 is la disk 33 of nylon or like plastic material which 'has relatively frictiomfree surfaces so as to provide a bearing between the platform 12. andthe base 11 allowing free rotation of the platform on th'e base and not requiring lubrication.

Resting on the rubber mat 27 and extending diametrally across the platform `12 and secured -to the disk 26 by screws 34 is an inertia weight mounting bar 35. 'Ibis bar has two sets of three vertical threaded holes 40 and 21 which are spaced respectively equal distances` from the Iaxis of the platform 12 for the purpose of securing to said bar a pair of inertia weights 42 and 43. These weights are identical, each having a bottom channel 44 which fits the bar 35 and an upper recess 45 which comprises a counterbore of a vertical hole 46 provided in the weight for accommodating a wingheaded screw 47 which is insented downwardly through the hole -46 and screwed into one of the tapped holes 40 or 41 to hold the weight in rigidly united relation with the platform i12.

The weights 42 and 43 are thus adapted to be united with the platform 12 with the centers of mass of these weights equally spaced from the axis of rotation of the platform. In FIGS. l, 2 and 3, weights 42 and 43 are shown in their full line positions in their maximum spacing from said axis, and broken lines 48 in FIG. 3 show these weights xed to the platform 12 in intermediate positions. This is to adjust the amount of inertia which is applied by the weights 42 and 43 to the platform 12 so that this will be suitable for the individual who at the moment may be using the same. Thus, a man using the exerciser shown in FIG. 1 will usually prefer to have weights 42 and 43 in their outwardmost positions Ias shown in FIGS. l, 2 and 3 in full lines. A woman using the exerciser will generally prefer to have weights 42 and 43 in their intermediate positions as shown in broken lines 48 in FIG. 3. When a child uses the exerciser `10, the weights 42 and 43 may be moved into their inwardmost positions or they may be removed entirely from the platform 12. Y

`The bolt 13 has a castellated nut 49 which is cottered to the bolt and spaced from the plate 20 by a washer 50 which is preferably of nylon to reduce the friction between this Iand the plate 20 when the platform i2 is rotated.

Operation The use of the platform 10 by a man is illustrated in FIG. 1. Here the exerciser is shown as associated with a towel bar `55 mounted on a wall 56 so that the bar 55 may be seized in the hands of the individual using the exerciser and still allow this individual to stand erect. When so standing on the platform 12, the spine of the individual is substantially in alignment with the vertical axis of the platform 12.V Holding his shoulders against rotation by gripping the bar '55, the individual rapidly twists his body from his shoulders downwardly either to the left or to the right ias far as he is. able. The initial part of such a twisting movement is retarded by the inertia weights 42 and -43 so that as the rotation of the platform |12 reaches top speed a substantial amount of kinetic energy is stored up in the momentum thus imparted to these weights.

As the muscles employed in thus rotating the platform 12 reach the limit of their capacity to impart rotation to the platform because these muscles are shortened in such effort, the individual using the exerciser relaxes momentarily allowing the momentum of the weights 42 and 43 as well as that of the balance of the platform 12to be applied in an involuntary twisting of the spinal column. ln the illustrated embodiment the weights 42 and 43 are iron and weigh about 21/2 pounds apiece so that these weights provide a torque moment of pounds applied `at the periphery of the platform l2. As the platform 1-2 is 16 inches in diameter in the preferred embodiment shown, rapid rotation of this in the body twisting exercise above described applies a very substantial snapping action to all the joints of the body between the shoulders 'and theV feet when all these joints are relaxed at the conclusion of the twisting movement.

The relaxing eect produced by this exercise becomes readily apparent from just one trial of the exerciser. This apparently results from a loosening up of the joints between adjacent vertebrae so as to relax pressures applied in a condition of tenseness to nerves passing outwardly from the spinal column through said joints.

Summing up the mode of operation of the exerciser 10 above described, it provides a means for storing substantial energy produced in the initial voluntary portion of a spinal twisting exercise which energy is applied to cause a continuation of this twisting movement while the body is relaxed which tends to loosen up all the joints in the body from the shoulders to the feet. Not only does the exerciser i0 provide this very `beneficial form of exercise for full grown adults but it includes a means for modifying the momentum employed in this exercise so as to adapt the exerciser 1t) for use also by children and women who do not desire to use `the maximum amount of momentum available.

The claims are:

1. In an exerciser for twisting the spine and loosening the joints between adjacent vertebrae, the combination of: a horizontal platform of appnopriate size to allow a person to stand uprightly theneon; base means for pivotally supporting said platform for free rotation of the latter about a centrally located vertical axis; a diametral bar secured to the upper face of said platform, said bar being provided with tapped holes at varying distances from said axis of rotation of Vsaid platform; a pair of weights; and screw means adapted to engage said tapped holes to secure said weights to said bar with the centers of mass of said weights located at Varying radii from said axis of rotation.

2. In an exerciser, the combination of: a circular horizontal platform of appropriatesize to accommodate a person standing uprightly thereon with his legs straddling a vertical plane containing a diameter `of said platform; base means pivotally supporting said platform for free rotation of the latter about its center; a diametral bar lying flat against and secured to the upper face of said platform with the longitudinal center line of said bar in said plane; a pair of realtively heavy compact metal blocks;

Y support himself thereon with his center of gravity directly over the center of said platform in preparation for rotating said platform by twisting his body.

References Cited in the le of this patent UNITED STATES VPATENTS 2,256,001 Titus Sept. 16, 1941 2,573,808 Ravoine Nov. `6, l951 2,657,055 Denham Oct. 27, 1953 2,835,492 La Londe May 20, 1958

Claims (1)

1. IN AN EXERCISER FOR TWISTING THE SPINE AND LOOSENING THE JOINTS BETWEEN ADJACENT VERTEBRAE, THE COMBINATION OF: A HORIZONTAL PLATFORM OF APPROPRIATE SIZE TO ALLOW A PERSON TO STAND UPRIGHTLY THEREON; BASE MEANS FOR PIVOTALLY SUPPORTING SAID PLATFORM FOR FREE ROTATION OF THE LATTER ABOUT A CENTRALLY LOCATED VERTICAL AXIS; A DIAMETRAL BAR SECURED TO THE UPPER FACE OF SAID PLATFORM, SAID BAR BEING PROVIDED WITH TAPPED HOLES AT VARYING DISTANCES FROM SAID AXIS OF ROTATION OF SAID PLATFORM; A PAIR OF WEIGHTS; AND SCREW MEANS ADAPTED TO ENGAGE SAID TAPPED HOLES TO SECURE SAID WEIGHTS TO SAID BAR WITH THE CENTERS OF MASS OF SAID WEIGHTS LOCATED AT VARYING RADII FROM SAID AXIS OF ROTATION.
US3100639A 1961-04-26 1961-04-26 Exerciser Expired - Lifetime US3100639A (en)

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Cited By (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3466040A (en) * 1966-09-06 1969-09-09 Michael P Sertich Pivot positioner for a baseball player's rear foot
US3659844A (en) * 1970-08-17 1972-05-02 Alfred B Cummins Exercises propelled and body supporting spring biased platform
US3730521A (en) * 1971-02-04 1973-05-01 D Sellman Amusement spinning device
US3911907A (en) * 1974-08-06 1975-10-14 Sangaree Dan E Planetary exercising machine
US4126308A (en) * 1976-05-25 1978-11-21 Crumley Jesse C Combination pommel horse and rotatable wheel mounted leg support device
US4132405A (en) * 1977-02-16 1979-01-02 Asher Nathan F Balanced swivel exercising device
US4290601A (en) * 1977-05-23 1981-09-22 Mittelstadt Robert A Wobble plate exercise device and toy
US4305579A (en) * 1980-08-25 1981-12-15 Max Rice Exercising device
US4386915A (en) * 1980-11-17 1983-06-07 Airoex Products, Inc. Dry land trick ski trainer
US4538807A (en) * 1984-07-06 1985-09-03 The Max Rice Corporation Torso building exercise machine
DE3410985A1 (en) * 1984-03-16 1985-09-26 Ries Nikolaus Hopscotch game
US4560165A (en) * 1983-05-27 1985-12-24 Frank Witteman Golf practice device
US4576372A (en) * 1984-11-29 1986-03-18 Michael Rinaldi Turntable exercise machine
USRE32150E (en) * 1981-02-19 1986-05-20 Weighted rotatable therapeutic exercise device
US4610448A (en) * 1984-01-27 1986-09-09 Hill David L Hand grip for push-ups
US4629176A (en) * 1984-12-07 1986-12-16 Xerox Corporation Paper gripper bar
US4673180A (en) * 1984-07-06 1987-06-16 The Max Rice Corporation Torso building exercise machine
US4836538A (en) * 1987-08-25 1989-06-06 The Max Rice Corporation Exercise machine with non-linear hydraulic resistance
WO1990011802A1 (en) * 1989-04-04 1990-10-18 Malibu Sports (Leeds) Limited Exercise device
US5002272A (en) * 1987-07-29 1991-03-26 Hanover Holdings Pty. Ltd. Resilient swivel exerciser
US5010606A (en) * 1990-02-27 1991-04-30 Safety 1St, Inc. Bath seat
US5158460A (en) * 1990-02-27 1992-10-27 Safety 1St, Inc. Bath seat
US5256127A (en) * 1992-08-20 1993-10-26 Peter Yeh Amusement twister equipped with sound reproducer
US5669081A (en) * 1996-06-28 1997-09-23 Brk Brands, Inc. Self-locking toilet seat cover
US5687433A (en) * 1996-06-27 1997-11-18 Brk Brands, Inc. Child bath seat
US20030224882A1 (en) * 2002-05-30 2003-12-04 Mahoney Michael J. Baseball training device and method of using same
US20040009859A1 (en) * 2002-07-10 2004-01-15 Gottlieb Marc S. Exercise device and method of using the same
US20050060801A1 (en) * 2003-09-19 2005-03-24 Hahn J. Roland Medical assist device
US20050076436A1 (en) * 2003-09-19 2005-04-14 Pivot Assist, Llc Medical assist device
US20050246489A1 (en) * 2004-04-30 2005-11-03 Cochran Robert A internal disk array mirror architecture
US20050255977A1 (en) * 2001-12-31 2005-11-17 Peter Slowinski Method and apparatus for exercising internal and external oblique muscles
US20080200318A1 (en) * 2006-06-29 2008-08-21 Hauser Stephen G Push-Up Exercise Unit and Device
US7503884B1 (en) * 1998-05-13 2009-03-17 Schall Stanley L Exercise apparatus
US7553267B1 (en) * 2008-01-18 2009-06-30 Perfect Pushup Llc Push-up exercise unit and device
US7591774B1 (en) * 2008-08-19 2009-09-22 Acas Design Co., Ltd. Waist twister with swaying function and heat radiating effect
US7621861B1 (en) * 2007-04-16 2009-11-24 Kalember Robert S Rotational exercise apparatus
US20100285941A1 (en) * 2009-05-08 2010-11-11 Vanburen Jeffrey A Perturbation apparatus and methods for proprioceptive and reactive balance training and therapy
US20110065555A1 (en) * 2009-09-11 2011-03-17 Moskowich Stan L Method and apparatus for push up exercises
US8302221B1 (en) 2009-03-03 2012-11-06 Pivot Assist, Llc Medical assist device with lift seat
CN103372279A (en) * 2012-04-12 2013-10-30 陈宗仁 Flywheel structure
EP2659936A1 (en) * 2012-05-04 2013-11-06 Tsung-Jen Chen Freewheel structure
USD797195S1 (en) * 2016-07-26 2017-09-12 Stacy Stack Mini gym platform

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2256001A (en) * 1940-03-18 1941-09-16 Bertha Saunders Exerciser
US2573808A (en) * 1948-08-12 1951-11-06 George N Moore Apparatus for teaching and practicing skiing
US2657055A (en) * 1951-02-13 1953-10-27 Denham James Earl Ski practice board
US2835492A (en) * 1955-04-15 1958-05-20 Londe Fred J La Pirouette exerciser

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2256001A (en) * 1940-03-18 1941-09-16 Bertha Saunders Exerciser
US2573808A (en) * 1948-08-12 1951-11-06 George N Moore Apparatus for teaching and practicing skiing
US2657055A (en) * 1951-02-13 1953-10-27 Denham James Earl Ski practice board
US2835492A (en) * 1955-04-15 1958-05-20 Londe Fred J La Pirouette exerciser

Cited By (53)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3466040A (en) * 1966-09-06 1969-09-09 Michael P Sertich Pivot positioner for a baseball player's rear foot
US3659844A (en) * 1970-08-17 1972-05-02 Alfred B Cummins Exercises propelled and body supporting spring biased platform
US3730521A (en) * 1971-02-04 1973-05-01 D Sellman Amusement spinning device
US3911907A (en) * 1974-08-06 1975-10-14 Sangaree Dan E Planetary exercising machine
US4126308A (en) * 1976-05-25 1978-11-21 Crumley Jesse C Combination pommel horse and rotatable wheel mounted leg support device
US4132405A (en) * 1977-02-16 1979-01-02 Asher Nathan F Balanced swivel exercising device
US4290601A (en) * 1977-05-23 1981-09-22 Mittelstadt Robert A Wobble plate exercise device and toy
US4305579A (en) * 1980-08-25 1981-12-15 Max Rice Exercising device
US4386915A (en) * 1980-11-17 1983-06-07 Airoex Products, Inc. Dry land trick ski trainer
USRE32150E (en) * 1981-02-19 1986-05-20 Weighted rotatable therapeutic exercise device
US4560165A (en) * 1983-05-27 1985-12-24 Frank Witteman Golf practice device
US4610448A (en) * 1984-01-27 1986-09-09 Hill David L Hand grip for push-ups
DE3410985A1 (en) * 1984-03-16 1985-09-26 Ries Nikolaus Hopscotch game
US4673180A (en) * 1984-07-06 1987-06-16 The Max Rice Corporation Torso building exercise machine
US4538807A (en) * 1984-07-06 1985-09-03 The Max Rice Corporation Torso building exercise machine
US4576372A (en) * 1984-11-29 1986-03-18 Michael Rinaldi Turntable exercise machine
US4629176A (en) * 1984-12-07 1986-12-16 Xerox Corporation Paper gripper bar
US5002272A (en) * 1987-07-29 1991-03-26 Hanover Holdings Pty. Ltd. Resilient swivel exerciser
US4836538A (en) * 1987-08-25 1989-06-06 The Max Rice Corporation Exercise machine with non-linear hydraulic resistance
WO1990011802A1 (en) * 1989-04-04 1990-10-18 Malibu Sports (Leeds) Limited Exercise device
US5010606A (en) * 1990-02-27 1991-04-30 Safety 1St, Inc. Bath seat
WO1991012759A1 (en) * 1990-02-27 1991-09-05 Safety 1St, Inc. Bath seat
US5158460A (en) * 1990-02-27 1992-10-27 Safety 1St, Inc. Bath seat
US5256127A (en) * 1992-08-20 1993-10-26 Peter Yeh Amusement twister equipped with sound reproducer
US5687433A (en) * 1996-06-27 1997-11-18 Brk Brands, Inc. Child bath seat
US5669081A (en) * 1996-06-28 1997-09-23 Brk Brands, Inc. Self-locking toilet seat cover
US7503884B1 (en) * 1998-05-13 2009-03-17 Schall Stanley L Exercise apparatus
US7896788B1 (en) 1998-05-13 2011-03-01 Stanley Schall Exercise apparatus
US20050255977A1 (en) * 2001-12-31 2005-11-17 Peter Slowinski Method and apparatus for exercising internal and external oblique muscles
US7118519B2 (en) * 2001-12-31 2006-10-10 Peter Slowinski Method and apparatus for exercising internal and external oblique muscles
US20030224882A1 (en) * 2002-05-30 2003-12-04 Mahoney Michael J. Baseball training device and method of using same
US20040009859A1 (en) * 2002-07-10 2004-01-15 Gottlieb Marc S. Exercise device and method of using the same
US7137938B2 (en) 2002-07-10 2006-11-21 Gottlieb Marc S Exercise device and method of using the same
US20050076436A1 (en) * 2003-09-19 2005-04-14 Pivot Assist, Llc Medical assist device
US7165276B2 (en) 2003-09-19 2007-01-23 Pivot Assist, L.L.C. Medical assist device
US7191477B2 (en) 2003-09-19 2007-03-20 Pivot Assist Llc Medical assist device
US20050060801A1 (en) * 2003-09-19 2005-03-24 Hahn J. Roland Medical assist device
US20050246489A1 (en) * 2004-04-30 2005-11-03 Cochran Robert A internal disk array mirror architecture
US20080200318A1 (en) * 2006-06-29 2008-08-21 Hauser Stephen G Push-Up Exercise Unit and Device
US7468025B2 (en) * 2006-06-29 2008-12-23 Perfect Pushup, Llc Push-up exercise unit and device
US7621861B1 (en) * 2007-04-16 2009-11-24 Kalember Robert S Rotational exercise apparatus
US20090186751A1 (en) * 2008-01-18 2009-07-23 Hauser Stephen G Push-up exercise unit and device
US7553267B1 (en) * 2008-01-18 2009-06-30 Perfect Pushup Llc Push-up exercise unit and device
US20090186750A1 (en) * 2008-01-18 2009-07-23 Hauser Stephen G Push-up exercise unit and device
US7591774B1 (en) * 2008-08-19 2009-09-22 Acas Design Co., Ltd. Waist twister with swaying function and heat radiating effect
US8302221B1 (en) 2009-03-03 2012-11-06 Pivot Assist, Llc Medical assist device with lift seat
US20100285941A1 (en) * 2009-05-08 2010-11-11 Vanburen Jeffrey A Perturbation apparatus and methods for proprioceptive and reactive balance training and therapy
US8435164B2 (en) 2009-05-08 2013-05-07 Jeffrey A. VanBuren Perturbation apparatus and methods for proprioceptive and reactive balance training and therapy
US20110065555A1 (en) * 2009-09-11 2011-03-17 Moskowich Stan L Method and apparatus for push up exercises
US7935040B2 (en) 2009-09-11 2011-05-03 Moskowich Stan L Method and apparatus for push up exercises
CN103372279A (en) * 2012-04-12 2013-10-30 陈宗仁 Flywheel structure
EP2659936A1 (en) * 2012-05-04 2013-11-06 Tsung-Jen Chen Freewheel structure
USD797195S1 (en) * 2016-07-26 2017-09-12 Stacy Stack Mini gym platform

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