US Patent 7357767 Adjustable balance board with freely moveable sphere fulcrum

An adjustable balance board for use in rehabilitation, fitness training, and action sports such as skateboarding, snowboarding, and surfing comprises of a solid standing platform placed on top of a variety of fulcrums. The fulcrums include, but are not limited to, a fixed half sphere, a free rolling cylinder, and a free rolling sphere. A railing system on the underside of the board acts to contain the fulcrum within the available rolling space. The available rolling space is made adjustable by two removeable end stops, each with a mechanism that secures the end stop to the railing system.