Patent attributes
A convertible side plank and balance exercise device includes a platform and a base extending rearwardly from the platform. The convertible exercise device has a circular or oval front perimeter that extends around the platform. The base has a domed rear surface. A front side of the device includes left and right footwells for receiving a left shoe and a right shoe when the device is in a side plank exercise configuration. The device further includes removable left and right footwell inserts that are removably insertable into the footwells to provide a flat front surface on the front side of the device in a balance exercise configuration. The base includes an air chamber with an inflation and deflation valve and a distensible rear panel comprising the domed rear surface, the rear panel collapsing for storage and shipping when the air chamber is deflated.