| 摘要 |
An exercise device is intended for strengthening a user's targeted muscle, wherein the user may manipulate the device without the necessity of a forceful grip that employs the user's conjunctive muscles. The device includes a housing having a pair of diametrically-opposed portions (preferably hemispherical) each of which has a peripheral edge. The peripheral edges are formed having alternating tongue and groove segments so as to provide a solid mating relationship therebetween. A single weight means is disposed in the housing, and the weight means has a pair of opposite ends, each of which is secured to a respective diametrically opposed portion of the housing. The housing has an opening formed therein defined by the walls of the device. An insert means is disposed in the opening to cushion the user's hand in the opening.
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