Any golfer, or even those who have simply observed the game of golf, inherently understand that the swing is primarily a rotational movement. With any rotational sport, whether it be golf, punching, throwing, or tennis, there is a contribution to this rotation from several segments of the body, or what we refer to as the kinetic chain.
Maximizing force output in rotational movements for the large part requires optimization of rotational force through the hips and the upper back (thoracic spine).
If we fail to utilize these areas to their maximal potential, we may leave a lot of potential power (in other words, yards!) on the table. This may also increase the rotational load through the lower back, potentially contributing to injury in this area.