Sasho MacKenize (PhD in Sports Biomechanics) explains the patterns of forces and torques exerted on the club and the ground during the golf swing.  He embellishes on how each hand exerts force on the club and how they work together to present the clubface efficiently and correctly for ball-striking success.   Sasho also talks about ground force reaction and how to move pressure in the feet correctly to maximize power by improving the launch angle.  Along those lines he delves into COP (Center of Pressure) and COM (Center of Mass) during the swing and explains how they should operate.  Dr. MacKenize also shares ideas and drills that you can do to control the club and use the ground correctly during your golf swing.