From a fitness aspect, the golfer’s slice may be a direct result of the body being too strong on one side and too weak on the other. Most right-handed golfers show adequate strength on their dominant side but have trouble activating their less dominant left side.
The right-handed golfer is generally too strong on one side and as a result their set-up usually has the right shoulder taking over the address position. The left shoulder is then shoved to the left side producing an open set-up. As a result the club path works outside and across at the impact position.
To combat this many say to “just move your left shoulder across”. This is easier said than done. The physical problem is the left side of the right-handed golfer is less active and often has limited strength. Therefore it is often spun out of the way on the downswing or impact position.
To change the technique of your swing you have to change the physical fault. This doesn’t mean complete postural analysis – but just pinpointing the weak area. Slicers have weak left side muscles, so we design single-sided exercises to help balance the equation and improve the functionality of both sides of the golf anatomy.
With today’s lifestyle of sitting for long periods, driving your car for hours to-and-from work, etc. there is little chance that your posture will be perfect. To change what you have developed over your lifetime is a tall order, especially through generic stretches and exercises. So pinpointing specific strength limitations in your golf swing is the way to go.