There’s a fine line between hitting your driver farther and hitting it all over the map. If you want to gain distance without losing accuracy, there are proven ways to do it. Take your time with each step and drill. This isn’t about gaining 20 yards overnight. Even one yard at a time can make a noticeable difference in your game.
Flare out your lead foot
When your lead foot is square, it blocks your hip rotation. Sometimes the upper body jumps in to compensate and you pull it or strike the driver with an open clubface. When you flare out the lead foot 20 to 30 degrees, it makes it easier to rotate through while staying in balance.
I like to set up square first and then turn the lead foot slightly so I know my stance parallel to the target line.
Get a better coil
The drill below from Top Speed Golf is one I’ve had my son work on. He’s 11 and wants to gain more power. This split-handed grip drill helps players feel a better coil.
If you want to swing harder but aren’t sure how to go about it, I would suggest working on this drill to engage the big muscles and stay on plane at the same time.
