EXERCISE · MACHINE
Leg Curl
Legs
You should feel this one almost entirely behind your knee and up through your hamstring, not in your calves or your lower back. Keep your hips pressed into the pad the whole time — if they lift as you curl, you've gone past the range your hamstrings can control and your lower back is taking over. Curl your heels toward your glutes, pause and squeeze at the top, then let the pad return slowly rather than letting the weight stack drop it for you.