The Count to Two Drill (Torso Engagement)

Slow the backswing down so your body turn, not your hands, starts the club moving, then let the lower body initiate the downswing before your arms react. Most tempo problems are really rushing problems: the transition fires too fast. Train a 3:1 backswing-to-downswing ratio with counting or metronome drills until it's automatic.

You overswing when your arms keep travelling after your shoulder turn has stopped, so the trail elbow loses its fold and the club drops past parallel. Check first whether it costs you strike or direction. If it does, rehearse stopping the arms when the chest stops turning and build speed from rotation instead of backswing length.