Bodyweight exercise performed with the help of a chair, stepper or bench. It works the tricep muscles, and is a modified version of a tricep dip.

Stand with your back to a chair, place your hands flat on it close to the edge, and place your legs out in front of you. Start with your arms fully extended, and perform a rep by lowering yourself down so that your elbows reach a 90 degree angle, then raising yourself up again.