Swing Faults that cause Low Back Pain
Golfers told to stick their butt out at set up increase the lordosis (arching the lower back). This is S Posture and this position inhibits the activation and strength of the abdominal and the gluteus muscles. Resulting in lower core control and stability of the lumbar pelvic complex.
Reverse Spine Angle
If the golfers spine/trunk tilts towards the target at the top of the backswing they are in reverse spine angle. They are excessively using their back extensor muscles, which inhibit the lower abdominal muscles and increases the crunch factor the lumbar spine will be subjected to on the downswing. Which places excessive compression and shear loads on the vertebrae through impact.
When the lower body doesn’t rotate through impact and pushes forward, the golfer moves into hip and spine extension (moving away from the ball). This movement inhibits the abdominals ability to stabilize the lower back.
Limited Trail Leg Follow Through
When golfers don’t release their trailside foot during the downswing after impact an unnecessary torque force is created in the trailside lower back.
Reverse C Finish
After completing the downswing the golfer finishes in a postural position of hyperextension, which places excessive compressive and shear loads on the lower trail side vertebrae and discs.