Do not flop from one side to the next. Maintain balance and control. Your goal is 3 sets of 20 reps with 30-second rest.
1. Come to a hands and knees position with your knees underneath your hips, wrists underneath your shoulders.
2. Slowly extend your left leg until it parallel to the floor. Simultaneously, raise and straighten your right arm.
3. Gently lower yourself back to your starting position and alternate sides.