Leg Extensions! Firstly, when using machines like a leg curl and a leg extension it’s imperative we line up the pivot point of the machine... with the knee joint which is doing the movement. I see people get this wrong all the time and struggle to understand why they are not executing a movement correctly or feeling pain. Line up the middle of the knee joint with the pivot point of the machine - trust me. Makes a huge difference Secondly, foot positioning on a leg extension. Simply put. Leg exte