Step 1
Starting Position: Lie prone (on your stomach) on a mat with your legs extended, ankles slightly plantarflexed (toes pointing away from your shins), arms extended overhead with palms facing each other. Relax your head to align it with your spine.

Step 2
Upward Phase: Exhale, contract your abdominal/core muscles to stabilize your spine and slowly raise one arm a few inches off the floor keeping your arm extended and avoiding any rotation in your arm. Maintain your head and torso position, avoiding any arching in your back or raising of your head. Hold this position briefly.

Step 3
Downward Phase: Gently inhale and lower your arm back towards your starting position without any movement in your low back or hips.

Step 4
Exercise Variation (1): From your starting position, contract your abdominal and core muscles to stabilize your spine and slowly extend one hip (raise one leg) a few inches off the floor keeping your leg extended, ankle plantarflexed (toes pointing away from your shins) and avoiding any rotation in your leg. Maintain your head and torso position, avoiding any arching in your back or raising of your head. Hold this position briefly before returning to your starting position.

Step 5
Exercise Variation(2): From your starting position, contract your abdominal/core muscles to stabilize your spine and slowly extend one hip (raise one leg) a few inches off the floor while simultaneously raising the opposite arm a few inches off the floor. Keep both your leg and arm extended and avoiding any rotation in each. Maintain your head and torso position, avoiding any arching in your back or raising of your head. Hold this position briefly before returning to your starting position.