| 摘要 |
An exercise machine (100) for exercising the rotary torso muscles of the human body, whereupon a user's body is supported in a generally supine position. The machine is comprised of a frame structure (101) with a rotable upper torso support (105) (including a head and back rest (121)), a rotatable lower torso support (103) (including a seat (119)) and feet stabilizing rollers (110), aligned longitudinally. The device further comprises a knee cushion (104) for rotating the lower torso support (103) and a peg (106) upon a weight support arm (127) for holding free weights that impart resistance against the rotation of the upper and lower torso supports (105, 103). Supplemental resistance to the rotation movement may be provided by a belt mechanism (180 of FIG. 4) including a belt (181) wrapped around a cam (151) connected to the axle (157) of the upper torso support (105) and up through the weight support arm upon which free weights are placed.
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