Extreme Push ups...

A push-up (or press-up) is a common calisthenics exercise performed in a prone position by raising and lowering the body using the arms.

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 basic exercise used in civilian athletic training or physical education and commonly in military physical training.