This version of the Pushup isolates the tricep (back of the arm) muscles.
Kneel down on the floor or a mat, placing your hand thumbs together and raise your up on your toes.
Draw your abs in and keep your back and neck in a straight line.
Slowly lower your body towards the floor, by bending your arms, until you are nearly touching the floor.
In a controlled manner raise your body back up to the starting position.