An exercise device employed to increase the level of difficulty of the standard pushup, while increasing strength, endurance, and flexibility. The device may include a flat, circular plate formed with a dome on one side and a low-friction pad affixed to the other side. The device has two modes of employment and is typically used in a pair, one device gripped in each hand during a pushup exercise. In one mode, the dome side is placed on the floor, forcing the user to stabilize his hands, arms, and upper body over inherently unstable, dome-shaped, high-friction surface during a pushup. The second manner of employment requires the user to stabilize the hands, arms, and upper body over the flat side of the device that has negligible friction against a floor. The devices further have embedded magnets that assist in compact storage when not in use.