Patent ID: 7922623

Claim:
An adjustable aerobic exercise device comprising: a platform having a substantially flat top surface and a bottom, the platform configured to extend parallel to a horizontal support surface when disposed on the horizontal support surface; at least one inclined riser block with at least one interlocking surface matingly engageable with the bottom of the platform for elevating the platform above the horizontal support surface and inclining the platform relative to the horizontal support surface, the inclined riser block having a pair of sides, a top face extending at an incline from one side to the other side, and a bottom face, the top face of the inclined riser block matingly engageable with the bottom of the platform, the incline of the top face being closer to the bottom face at the one side than at the other side substantially the same as the incline of the platform when the top face is matingly engaged with the platform, and wherein when the platform is stably supported by at least one riser block it is configured to be used for performing aerobic stepping exercise, and wherein the platform has a width and a length, the inclined riser block is configured to incline the platform relative to the support surface alternatively along the width of the platform or along the length of the platform.