Push ups?

The push-up is a common calisthenics exercise beginning from the prone position. By raising and lowering the body using the arms while using the legs as support, push-ups exercise the pectoral muscles, triceps, and anterior deltoids, with ancillary benefits to the rest of the deltoids, serratus anterior, coracobrachialis, and the midsection as a whole. Push-ups are a repetitive basic exercise used in civilian athletic training or physical education and commonly in military physical training. It is also a common form of punishment used in the military, school sport, and some martial arts disciplines for its humiliating factor and for its lack of equipment. Variations, such as wide-arm and diamond push-ups, target specific muscle groups and provide further challenges.