发明授权
US5318489A Adjustable stepping structure for aerobic exercises 失效
有氧运动可调步进结构

Adjustable stepping structure for aerobic exercises
摘要:
An adjustable stepping structure for aerobic exercises comprising a platform upon which the participant places his or her feet, the platform being elevated above a support surface by means of one or more support elements which are capable of being detachably stacked upon each other until the platform is maintained at a selected distance above the support surface, depending upon the skill and physical characteristics of the participant.
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