
Stand nice and tall with your feet placed slightly wider than your shoulders.
Raise one arm up and sideways over your head. Try to keep that arm away from your ear as much as possible.
Lean to the other side as if you're trying to reach the ceiling. Avoid twisting your upper body as you lean to the side.
Remember to keep your core engaged by pulling in your belly button as you continue to breathe. Also, make sure that your core and glutes are tucked in. You should feel a gentle stretch along the side of your body extending from your lower back up to your shoulder.
Hold the stretch for 20 to 30 seconds.
Return to the starting position and relax.
Do at least 2 sets of 4.
Switch sides and repeat the above steps.