| 摘要 |
An exercise device comprising: a support platform, to support a user, a frame, extending below the support platform, to support the support platform, and a base-engaging section, positioned below the frame, and being sized and shaped to engage a step-riser, wherein the support platform may be set to one or more predetermined heights above a flat surface to accommodate users of different sizes, by said exercise device being placed on the flat surface or one or more step risers.
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