Here's Ron: Along with center-face contact, clubhead speed is perhaps the biggest factor in how far you hit the ball. But many amateurs struggle to create clubhead speed the right way. Simply throwing your arms down at the ball is not going to help you hit big drives, says Golf Digest Teaching Professional Sean Foley.
"Obviously body turn plays a huge role in creating clubhead speed," he says. "But what most amateurs don't understand is speed also comes from forearm rotation."
A counter-clockwise rotation of the forearms should start the moment the downswing is initiated. Ideally, this rotation would allow the clubface to go from slightly open to slightly closed right at the moment of impact. This transfers the energy of the forearm rotation into the ball with maximum force.
To train your forearms to make a more powerful rotation, and strengthen your core at the same time, click on the video below.