In the video below personal trainer and bodybuilder Tuan Tran performs some burnout sets on push ups to finish off his chest workout on that day. Tuan explains: "A press-up (British English) or push up (American English) is a common strength training exercise performed in a prone position, lying horizontal and face down, raising and lowering the body using the arms. Press-ups develop the pectoral muscles and triceps, with ancillary benefits to the deltoids, serratus anterior, coracobrachialis and the midsection as a whole. Press-ups are a basic exercise used in civilian athletic training or physical education and commonly in military physical training. Here I am performing them to failure so I can build up my strength endurance."