The supine arm lengthener promotes shoulder mobility and good upper body posture.
Begin lying on your back with legs straight and arms down by your sides.
Slowly reach one arm up over your head keeping your elbow straight until it is above your head, resting on the floor. Gently reach that arm higher, making it as long as possible without changing the position of your spine and hips. Hold for 5 seconds. Then return to the starting position and switch sides.