In this Tenpo Tip, Coach Andre explains why exactly twisting your knees is causing knee pain.
Modern tennis players have been taught a technique which requires them to twist or rotate their feet, ankles and knees. But why is this wrong?
The simple answer is FRICTION!
The knee is a hinge joint specifically evolved for flexion and extension. The ligaments are attached vertically which means it is designed to move in the vertical plan.
Twisting your knees causes pain because of friction. The simple biomechanical fact is our knee is a hinge joint and has not evolved to operate in this manner on a consistent basis.
If you twist your knees, it's not a matter of if you are going to have knee pain; it is when!