| 摘要 |
An exercising device for strengthening the trunk muscles of a human being. The device comprises, inter alia, a frame that is permanently attached to a support surface, and a yoke that is secured to a support arm on the frame. A pair of resistance elements, preferably hydraulic cylinders, are mounted between the frame and the yoke, one cylinder being secured on each side of the centrally situated support arm. The yoke is adjusted to fit about the upper trunk of the user, and the user twists his trunk to pivot the yoke about the support arm against the resistance provided in a horizontal plane by the hydraulic cylinders. A stabilizer bar prevents the hips of the user from rotating while using the exercise device.
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