US Patent 7588521 Push-up exercise apparatus

A device for performing weighted push-ups in a safe environment is provided. The device comprises a) a pair of hollow, parallel supports; b) a pair of essentially symmetrical L-shaped arms, comprising a vertically downward segment and a horizontal segment, said vertically downward segments adapted to be vertically moveable within said parallel supports ; c) a pair of essentially parallel guide elements affixed to the horizontal segment each of the L-shaped arms; and d) a weight support platform attached to upright rods that are slideable within the guide elements.