Press-ups

1.

Begin lying prone on your stomach with your hands under your shoulders like you would perform a push-up.  Turn your feet slightly inward.  Keep the buttocks and back relaxed.

2.

Using only your arms, slowly press your chest off the floor keeping your back relaxed.

3.

Continue upward until your arms are locked.  To further increase the curve in the low back, exhale and relax the stomach muscles.  Remain here for about 1 second, then slowly return to the prone position.