Begin lying on your stomach on a yoga mat with both legs extended behind you, toes tucked. Extend your arms above your head, palms facing toward the mat, to form a straight line from hands to feet. Draw your belly button in toward your spine to prevent discomfort in your lower back. This is your starting position.
Inhale. Elevate your head, chest, and arms off the mat. At the same time, elevate your legs off the mat slightly with feet pointed. You should feel tension in your core as you hold this position.
Exhale. Bend your left elbow to bring your left hand behind you until it rests just above your lower back. At the same time, rotate your hand so your palm faces upward.
Inhale. Extend your left arm back above your head, rotating your hand so your palm faces toward the mat.