| 摘要 |
An exercise apparatus and associate method that provides a variable resistance to muscle movement during the course of a single exercise. The apparatus includes an articulated arm assembly that supports a selected amount of weight plates at one end. The arm assembly is connected to a support frame at a pivot point. The opposite end of the arm assembly is connected to a cable that extends to an exercise attachment that is moved by the user's muscles. As a user exercises, a tensile force is applied to the cable. The tensile force applies a torque to the arm assembly that causes the arm assembly to turn about the pivot point. As the arm assembly moves, the weights are advanced up along an inclined surface. If a strong enough force is applied, the weights can be advanced over the top of the inclined surface. Without the support of the inclined surface, the arm assembly is free to remain extended. In this extended position, the distance between the weight plates and the pivot point is increased, therefore the counter-torque offered by the weights is increased. As a result, the user must apply an increased tensile force to resist the increased counter-torque offered while the weight plates are slowly lowered.
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