There are several key factors to consider when learning how to start the backswing in golf, especially as the combination of this and your ability to effectively initiate the downswing will ultimately dictate the outcome of your shot.
Understanding subtle aspects such as how long your backswing should be, how to avoid an overswing and how to get a straight left arm in your golf swing will help you to strike the ball better, but this deeper understanding can also help you to eliminate some of the most common swing faults at source.
