The theory behind Jim McLean’s X-factor, involves a direct relationship between amount of shoulder turn, hip turn and swing speed. The theory is sound.
The more flexible you are with your shoulders, the bigger your X-factor will become. For many of my students their lack of power is because of a poor shoulder turn, usually due to a lack of flexibility.
Also, especially in beginners, an arms-only swing is a common sight. However, amusingly enough, the swing becomes so much simpler when you involve the shoulders. With the right posture, your swing should be shoulders-only and the hands just hang on for the ride.
Have you ever seen a professional cross his arms over his chest, stand in proper posture and just rotate his shoulders? It looks simple doesn’t it? Add a little rhythm and that’s all it takes to hit a golf ball. Not to mention, this simple motion is easily repeatable, and dependable. The problem is, without flexibility in your shoulders, creating this simple swing is pretty much impossible. If you have trouble getting your shoulders to turn 90 degrees, you need to work on your shoulder flexibility.
The drill will help you involve your shoulders more in your swing, increase you flexibility and help to fight against an arms-only swing. You will need a length of rope, and an old golf shaft. Place the shaft in the ground at an angle as shown. Loop the rope around the shaft and setup in a proper setup position (see set up fundamentals ). Grab both ends of the rope and begin to rotate your shoulders. You will notice the effect moving one of your shoulders has on the other during this drill. You will also be learning what it feels like to involve your shoulders in your swing, which is essential in creating a consistent, repeatable swing.