Stan Utley is a friend, PGA Tour putting coach and contributor to my DVD, Lower Your Score. Check out Stans putting tips at www.KRFlexFit.com. Stan believes the putting stroke specifically the action of the upper body begins with mobility and movement in the thoracic spine, the mid-back area. If you are tight in this part of the body it may create an inconsistent putting stroke.
Do you have a curve in your upper spine? Do you have rounded shoulders? Here is a way to check your posture. Stand facing the mirror. Do the backs of your hands face the mirror? If so there is a good chance you have tight chest muscles and a rounded, inflexible mid-back.
The following exercises will help you increase the flexibility in your thoracic spine, helping you with a more consistent putting stroke.
Chest opener on the ball:
Begin on your back and slide your body down the ball until your head is supported.
Use your glutes to lift your hips parallel to the floor. Open the arms at shoulder height or slightly lower and rest in this position for three minutes.
Standing mid and upper back stretch:
Begin with the feet hip width apart, knees slightly bent, hands clasped and arms extended at shoulder height. Press your hands away from your body and tuck your chin into your chest. Hold for five deep breaths and repeat three times.