This simple exercise warms up the small muscles that support the shoulder joint, which are known collectively as the rotator cuff.
Raise your arms out to the side until your upper arms are parallel to the ground, with your elbows bent to 90 degrees.
Rotate your upper arms forward to bring your finger tips toward the floor; then rotate the upper arm backward to bring your finger tips back up. This completes one rep. Continue for 30 seconds.