There are a number of moves that cause golfers to leak power during the swing, including an exaggerated swaying motion.

This happens when the (right-handed) golfer shifts too much weight to the right side on the backswing. Typically, the head and shoulders will move well to the right of the ball. Part of the golfer's weight will shift to the outside of the right foot, causing the knee to bend slightly outward.

Often, the swaying golfer will leave too much weight on the right side during the downswing, resulting in weak, right-veering shots. Or, he'll sway back to the left, causing a multitude of mishits.