Side lying open books are a great way to improve your thoracic rotation and your separation in the golf swing. Improving thoracic rotation can improve your backswing rotation and rotation through the ball. It is also very important for proper movement in chipping and putting.

When performing the open book keep knees stacked and from belly button down still. Try to feel rotation through your upper back (from bottom of the ribs to the top of the shoulder blades). Once you are in a full rotation, deep diaphragm breath into the upper back and when breathing out completely relax and rotate further.

3 repetitions per side with a 2 breath hold