Abstract: An athletic and rehabilitative aid to build muscle mass and increase muscle tones in the peripheral extremities--the legs and arms.The malleable belt is comprised of a foam rubber like material containing synchronized weighted bars to form a flexible cartridge, which is covered with a fabric like material.The cartridge is used within a removeable exterior cover, allowing the user to vary the amounts of weight. The weights are inserted thru a zippered like opening in the cover. The exterior cover has two parallel straps with fasteners, which allow it to be easily attached to an arm or leg.The uniqueness of this aid allows one to use varied amounts of weighted cartridges easily exchanged.