HOW TO AVOID INJURY: If you grip the club with your left hand in a weak position, the thumb down the top of the handle (above, 1), you risk having a flat or even bowed left wrist at impact. Instead, rotate your left hand away from the target about 30 degrees from that weak position. This will put the thumb at about 1:30 on an imaginary clock face, more down the right side of the grip, and create the slight cup you want in the wrist (2). —Johnson