Practice swing with a backswing twice as long as needed
As an on-course routine, the coach has the player make a practice swing that brushes the ground while delivering a backswing almost twice as long as the shot actually needs. The oversized rehearsal is meant to free you up before the real swing.
Channel: Dan Grieve
Watch official source at 22:27Why this context matters
Offered as an on-course pre-shot routine.