HOW: Get into a seated position in the knee extension machine. Place the pad just above your ankle joint. Make sure that the ankle is below the knee. Keep the other leg back, off the padding. Anchor and stabilize your upper body and core by grasping the handles.
Push into the pads to straighten the knee. Slowly return back to the starting position.
FEEL: You will feel the front of the thigh, and the quadriceps.
COMPENSATION: Do not move the torso. Do not rotate the leg.