Do you work at a computer, sitting behind a desk or sit behind the wheel of a car for most of the day? Then you are a candidate for a tight neck, and a tight neck manifest itself as a swing fault. If I can illustrate here: Once the muscles in the neck get tight, and again, once rotation is lost through the vertebrate in the neck, we will tend to get a similar fault to what we had before with an over-rotation.
Stiff Neck Limits Head Rotation
Typically we will end up getting the head to rotate quite an amount, and generally off of the ball a little bit as we lose that range. And that can cause a number of problems in the backswing and downswing as we compensate for that with an excessive amount of lateral body shift and weight shift. As Denis stated, a lot of us are in that flex posture putting a lot of stiffness through our neck. But the neck just doesn’t get stiff, we actually bring the neck forward and the neck drops, and we lose a lot of the stability muscles.
Avoiding a Flex Posture
We lose control through those muscles and we are left in this sort of flex posture. That will put a lot of sheering force through your neck when you are swinging a golf club. So your neck is in the wrong position, you are swinging, and this is going to put a lot more whiplash through the neck itself. Here are two exercises I would recommend, once again in sequence, to make sure that you have good rotation, good flexibility through the neck but also good stability through the neck itself.