HOW: Start in the push up position with your hands directly underneath your shoulders and your legs straight back with your toes pushing into the ground. Push the ground away from you and lift your hips into the air. Hold that stretch as long as prescribed and return to the starting position.
FEEL: You should feel a stretch in your low back. You should also feel your shoulder muscles working.
COMPENSATION: Keep your legs straight as you lift your hips up, don’t bend your knees. Keep your elbows straight as you push away from the ground.