when you are driving or practicing your irons or woods on the driving range, and you have the problem of collapsing the left side, which means if you make your golf swing and instead of pivoting around your left leg, you are pushing yourself away from the ball. If the lead leg is not strong enough, you might need your golf bag to help you fix your problem. If you sway and not swing, you might have this problem with a collapsing leg.
