A press up (also push up) is a common strength trainingexercise performed while lying horizontal and face down, raising and lowering using the arms. In the full press up, the back and legs are straight and off the floor. Several variations are seen, besides the common push up. Including, bringing the thumbs and index fingers of your hands together (a diamond pushup) as well as having your elbows point towards your knees. These two variations are intended to put greater emphasis on the tricep muscles rather then the shoulder and chest muscles. When both hands are unbalanced or on uneaven surfaces, this exersize also works the body core.
description / procedure: Start in the pushup position - with the hands and toes touching the floor, the body and legs are in a straight line, feet slightly apart, the arms at shoulder width apart, extended and at a right angles to the body.
Keeping the back and knees straight, the subject lowers the body until there is a 90-degree angle at the elbows, with the upper arms parallel to the floor.
Another modification is just to record the total number of pushups completed in a set time period or at any tempo.
Several variations are seen, besides the common pushup.
Another is simply an explosive press-up where a person attempts to push quickly and with enough force to raise their hands several centimeters off the ground, with the body completely suspended on the feet for a moment, a variation of the drop push.