| 摘要 |
In a balance exercise machine ( 1 ), a swing mechanism ( 3 ) swings a seat ( 2 ) with composition of a swing motion in an anteroposterior direction (direction X) and a swing motion in a widthwise direction (direction Y). The swing motion of the seat ( 2 ) in the anteroposterior direction is driven faster than, preferably twice as faster as that in the widthwise direction. The origin of the swing motion of the seat ( 2 ) in the widthwise direction is discrepant from origin of the swing motion of the seat ( 2 ) in the anteroposterior direction within a half-cycle.
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