To create your maximum clubhead speed from your golf swing, you want all your muscles to move through their full range of motion. Your shoulders, especially, should move freely throughout the swing. This exercise will help stretch your shoulders.
Get down on floor on all fours.
Stretch one arm out on the ground as you lean forward.
Take the other arm and slide it underneath the stretch arm, keeping your palm up.
Both arms should be straight as you keep your shoulders square.
Lean forward to feel a stretch in your shoulder.
Hold position for 8 to 10 counts.
Repeat on opposite side.