Your ability to create power comes from the ground up; from your feet, through your legs all the way to your arms and finally to the club. So you want to have a strong, flexible legs. You want to be able to take your muscles through their full range of motion. This exercise will not only improve your strength but will also challenge your flexibility in your lower body.
Side Lunge with Ball Roll-
Hold an exercise ball and get into a squat position.
Roll the ball laterally as you lunge to the side.
Keep your knee on the flexed leg over your foot as you extend the other leg through its full range of motion.
Extend your arms, pushing the ball away from you. Return to the start position and repeat motion on the opposite leg.
Do 8 to 10 repetitions on both legs.
The side to side motion and change of direction in this exercise is the same movement pattern needed for your weight shift.