Back in a 2006 issue of GOLF Magazine, Peter Kostis broke down a key "X-factor" that pros use to add serious speed to their swings.

A hammer drill can help golfers improve their takeaway and fix their golf swing issues. Instructor Kelvin Kelley says, “Everybody can hammer a nail,” relating it to the correct backswing motion.

Tension is identified as one of the top factors that ruins golf swings. “Tension destroys golf swings... kills your rotation,” says instructor Mike Dickson. Staying relaxed improves swing mechanics ...