It looks like the club is being swung around and behind the golfer by the arms.  This is a mistaken idea, and one that causes a multitude of problems.  THE ROLE OF THE ARMS IS TO SWING THE CLUB UP IN FRONT OF THE CHEST, THEN BACK DOWN, A LOT LIKE CHOPPING WOOD OR POUNDING A STAKE WITH A SLEDGEHAMMER!

Sound contradictory?  Chopping?  Pounding?  Up and down 5BB ?  This is an illusion worthy of Houdini.  What brings the club back and around is not the arms, it is the turning of the torso. The arms only go in the up and down dimension.  Trying to get the arms to do what the body should be doing is disastrous.

This is the `rub your belly as you pat your head’ dilemma.  The arms go one way while the body goes another.  Try this exercise:  hold a club in front of you, and raise it head high in front of your chest, folding your right arm and cocking your wrists (see the wrist cock illusion), all the while keeping your left arm extended.  Then make the same motion as you turn your back to the target.  Blend the two motions together, and you will be on your way to developing a powerful, repeating backswing.

A second exercise can be helpful for short hitters, as you will be amazed at the amount of force that you are capable of.  In the back yard, make the same arm lifting motion as described in the first exercise. From there, return the arms back down in front, slamming the club head into the ground.  What if you could make that same move but at the same time turn your back to the target, taking that force onto a different plane, applying it to the back of the ball as you re-turn your body toward the target.  Let the big dogs eat!