| 摘要 |
A jump exerciser includes a base having a mounting portion. A swivel seat includes a first end pivotally connected to the mounting portion. A footboard is rotatably mounted to the second end of the swivel seat. An elastic device has a first end pivotally connected to a mediate portion of the swivel seat and a second end pivotally connected to the mounting portion. A latch is provided to retain the footboard in place during jumping exercise. The latch is released to allow the user to stand on the footboard and twist his/her waist.
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