US Patent 8715144 Portable exercise platform with resistance mechanisms

A portable exercise platform described herein has at least one platform section with at least one longitudinal resistance mechanism and at least one latitudinal resistance mechanism. Preferred embodiments include a split longitudinal resistance mechanism and an interwoven latitudinal resistance mechanism. The split longitudinal resistance mechanism includes first and second parts, each part being attached to at least one platform section and having a plurality of resistance bands. The interwoven latitudinal resistance mechanism includes first and second parts, each part being attached to at least one platform section and having a plurality of resistance bands. Preferred embodiments include retractable handgrips, each handgrip having an extendable-retractable strap, each of the plurality of resistance bands suitable for directly or indirectly (via a spreader attachment device) attaching to the extendable-retractable strap.