Lie face down on an exercise mat with your legs extended directly behind you and forehead in contact with the floor. Extend your left arm out to your side so it's level with your shoulder. Bring your right hand to rest level with your chest, resting on your fingertips. This is your start position. Keeping your right hand in contact with the floor, gently lift your right leg and hip off the floor, bending your knee and bringing your foot to rest flat on the ground on the other side of you. Hold this position and feel the stretch in your chest. Hold for the recommended amount of time and then perform on the other side.