X Factor

The rotational difference between hip turn and shoulder turn during the golf swing, creating torque and power in the swing motion. A larger X Factor indicates greater separation between hip and shoulder rotation, which can generate more clubhead speed and distance. This concept, popularized by golf instructor Jim McLean, suggests that elite golfers create significant X Factor during their backswing and then rapidly decrease it during the downswing to generate maximum power. Modern swing analysis technology can measure X Factor to help golfers optimize their swing mechanics.