Patent ID: 8348812

Claim:
An adjustable stepping structure for aerobic exercise, comprising: a substantially rectangular platform having a top surface for stepping, sidewalls and endwalls, said sidewalls being laterally longer than said endwalls; and at least two support elements, said support elements having an upper portion, a base, and a notch formed into the upper portion, the notch having a downward arcuately curved profile, the combined lateral length of the upper portions of the support elements being shorter than the lateral length of the sidewalls of the platform; wherein the platform can be supported in a horizontal orientation relative to a floor surface by placing the platform on top of the support elements, with the upper portions of the support elements formed to nest within a lower portion of the platform; wherein the platform can be supported in a first angled orientation relative to the floor surface by placing a first endwall of the platform on the floor surface and a second endwall of the platform into the notch of one of the support elements; wherein the platform can be supported in a second angled orientation relative to the floor surface by placing a first sidewall of the platform on the floor surface and a second sidewall of the platform into the notch of two of the support elements; and wherein a first angle of the top surface with respect to the floor surface in the first angled orientation is less than a second angle of the top surface with respect to the floor surface in the second angled orientation.