COBRA 

PUSH UPS

Start by lying face down on the floor. Place your hands next to your ribcage, below your chest. Keep your elbows squeezed in toward your body while you raise your body up until your arms are straight and your weight is in your hands and your knees. Slowly (3-5 seconds) lower your body back down to the starting position. The slower the tempo, the more difficult the exercise. Repeat