Step-1. 1. Standing with your feet together, hold a 5- to 8-pound dumbbell in each hand, arms dropped straight in front of you. Inhale and shift your body weight over your right leg. On an exhale, lean forward and raise your left leg behind you. Keep your abdominals pulled in to support your spine.
Step-2. Once you feel stable balancing on your right leg, contract your back muscles and bend your elbows, pointing them backward until your dumbbells are close to your hips. Pause for 2 seconds, then lower your arms. Continue the arm movement 8 to 12 times while you maintain your balance. Bring your legs together and stand up, then repeat on the other leg.
Sources: Los Angeles Times