Position your hands on the ground at shoulder level, slightly wider than shoulder-width apart, and press your feet up against a wall with straight legs to hold yourself in place.
While maintaining a straight torso, exhale and allow your arms to extend, raising yourself up.
Continue until your arms are fully extended.
Inhale and lower yourself to the ground until just before your chest makes contact with the ground, continuing to maintain a rigid torso and returning to the starting position.