How to hit the ball further without swinging harder
Here are some tips that will improve your yardage off the tee that will easily work for anyone.
1. Widen your stance. At a minimum, your feet should be shoulder width apart. But try making your stance even wider and you'll find that you will pick up some more yardage. The reason for this is your swing arc will be wider (generating more swing speed) and you will hit the ball with a more sweeping motion rather than a descending one. The result is the ball will be hit with more force (without more effort) and the trajectory will allow for more roll when the ball hits the ground.
2. Tee your ball up higher. As a general rule, when your driver head is sitting on the ground, at least half of your ball teed up should be above the top edge of the driver head. This might look strange and give you the sense that you will go right underneath the ball and pop it straight up in the air. But realize that your driver head comes through the ball off the ground, not along the ground. What this encourages is that the ball is hit on the center of the clubface and not the bottom of the clubface, which transfers energy better (more distance) and avoids the ball being launched too low.
3. Turn your shoulders. By using the larger, more powerful muscles of your body, more force is generated without the need to swing harder or faster. Focus on turning your lead shoulder under your chin on the backswing and then have your trailing shoulder under your chin on the follow through. Don't worry if you don't have the flexibility to quite pull this off, or if you feel your arms aren't swinging back far enough - the goal is to have the feeling that your upper body is rotating versus your arms only swinging. As you get more used to this motion, your arms will naturally follow where your shoulders lead them.
Golf Operations Manager