Undertaking
Patent
1989-07-06
1990-12-25
Bahr, Robert
Undertaking
272116, 272143, 272132, A63B 2304, A63B 2308
Patent
active
049797379
ABSTRACT:
Apparatus for lower leg exercise wherein dorsiflexion and plantarflexion movements of the foot, about a machine axis substantially aligned with the axis of the ankle, are resisted by a frictional torque that varies in a predetermined manner with the angular position of the foot. Reducing the extent of friction contact surface overlap and/or reducing the radius to the perimeter of friction contact surface overlap causes torsional resistance to decrease. As the foot rotates about the ankle to either side of its neutral position, the natural leverage of the leg muscles opposing torsional resistance decreases. Corresponding reduction of resistance with reduction of muscle leverage permits the range of motion of lower leg exercise to be increased. In the preferred embodiment the apparatus has a handle and base which permit operation from a supine position on a bed, training table, or floor, with leg extended horizontally.
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"How I Manage Infrapatellar Tendinitis" by Jos. E. Black, MD, The Physician and Sportsmedicine, 10/84, pp. 86-92.
Bahr Robert
Reichard Lynne A.
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