Like most moves in sports , one of the crital elements in golf is ground connection.
Your better golfers and athletes know how to use the ground for power and speed. Stop and think for a moment how far the smaller guys and ladies on tour hit the golf ball. On the other hand, a weak hitter of the ball seem to lift off the ground.
A golfer needs to understand how to establish connection to the ground by compressing into it with your legs both on the backswing and downswing. This just a matter of basic physics as described by Newton’s third law of motion. By applying force into the ground, the ground exerts an equal and opposite force back within the body; thus creating a more dynamic golf swing.
Available resources include: force platforms and electromyograghy (EMG) devices.