3 a 3 b optionally the support members 3 a 3 b may comprise opposing hooks 4 a 4 b to serve as attachment points for the elastic member 5 ends in addition elastic member 5 may be formed with looped ends 7 to permit to receive the hooks and attach the elastic member ends to the upright support members 3 a 3 b in the alternative the ends of the elastic member 5 may simply be looped around the support members 3 a 3 b or the hooks 4 a 4 b and knotted 8 a 8 b the base is dimensioned to provide stability to the upright support members during use but such that the length and width thereof may be easily lifted and carried by one person lengths of between about 1 u00bd to about 3 feet with widths of between about 1 to about 2 feet are preferred additionally the stand should be formed of a rigid lightweight material and should preferably weigh between about 15 lbs to about 25 lbs as shown in fig2 the elastic member 5 maintained in tension by attachment to the upright supports provides resistance against deformation when a patient presses against the elastic member 5 with an appendage in this way muscles associated with moving the affected appendage are exercised against a load as will be appreciated by those skilled in the relevant arts this configuration may be effective for bi directional movement in the vertical plane of motion indicated.