Ground Reaction Forces (GRF)

Newton's Third Law applied to golf: For every action, there is an equal and opposite reaction.

The Three Forces

• Horizontal Force: The shift from trail side to lead side.
• Torsional Force: The twisting force that clears the hips.
• Vertical Force: The push upward that creates immense speed right before impact.

To maximize vertical force, you must first have horizontal force. If you hang back on your right foot (for right-handers), you cannot push up efficiently from the left leg. This is why posting up is critical.