| 摘要 |
<p>In one preferred embodiment, first and second platforms are respectively provided for supporting a user's arms and knees. Rollers on the bottom surface of at least one of the units facilitate relative movements between the units. A detent may extend from the unit receiving the user's legs to retain the user's calves or ankles on the unit. An elastic cord separable from at least one of the units may extend between the units to provide for a controlled relative movement between the units and to facilitate a collapse of the unit into suitcase size. In another preferred embodiment, a pair of units having straps for grasping by the units hands are provided, one for each of the user's arms. Each unit is rotatable and/or movable linearly on a support surface in any direction independently of the other. A third unit is for receiving and retaining the user's feet may be disposed on a rod which is adjustable in length in accordance with the length of the user's feet between the kneecaps and the ankles. A detainer vertically adjustable in height near one end of the rod receives and positions the user's ankles. Elastic cords may extend between the third unit and each of the first and second units. In a third embodiment, the cords have handles replacing the first and second units at the ends displaced from the third unit. In all embodiments, the units may be made from, or covered with, a pliant material.</p> |
