Make vertical force the priority in your swing
A mental model the instructor took from Pete Cowan: a swing has three forces, rotational, lateral, and vertical. For most amateurs the vertical force (up and down) should be in charge, because if you swing the club up and down you get the lateral motion for free, and if you fire the trail side down the rotation happens automatically.
Channel: Danny Maude
Watch official source at 5:48Why this context matters
Framework the instructor attributes to coach Pete Cowan.