Pace the backswing with your left shoulder
To keep the swing in sequence, move the clubhead at the same pace as your left shoulder turns on the way back. When the hands and club get quicker than the left shoulder, the body gets out in front. Use the left shoulder to pace the club.
Channel: PorzakGolf
Watch official source at 0:20Why this context matters
Coach diagnosing a student whose quick transition pulls the body out in front.