How to perform
Sit with your back against the pad and the roller resting on your lower shins, just above the ankles.
Line your knee joint up with the machine pivot.
Extend your knees until your legs are straight, pausing briefly at the top.
Lower under control without letting the weight stack touch down between reps.
Common mistakes: swinging the weight up with momentum, and letting the plates rest at the bottom, which removes tension.
