US Patent 7645221 Multi-angle exercise balance platform

An exercise device has a base, an exercise platform (which can be split into a left and right platform) and two or more springs that connect the base and the exercise platform(s) and hold the exercise platform(s) substantially parallel to the base when the exercise device is not in use, preventing the exercise platform(s) from coming into contact with the base when the exercise device is in use and allowing the position of the exercise platform to vary relative to the base as weight is applied to the exercise platform(s) at different points apart from a center point of weight balance while straps can be used to stabilize or selectively vary the center point of weight balance.