Leg Curl Mistakes to Avoid
Hips lifting off the bench — the most common cheat. Press your hips into the pad. If they lift, the weight is too heavy.
Partial range of motion — full curl to full extension. Cutting the bottom short misses the stretch; cutting the top misses the contraction.
Using momentum — don't swing the weight up. Slow, controlled curls with a squeeze at the top.
Pointing toes — keep feet relaxed or slightly dorsiflexed (toes pulled toward shins). This pre-stretches the calves and puts more demand on the hamstrings.
Leg Curl FAQ
Lying or seated leg curl?
Lying: hamstrings are more stretched at the hip (lying flat). Seated: hamstrings are more stretched at the hip (hips flexed from sitting). Seated tends to provide a better stretch stimulus. Both are effective — do whichever your gym has or alternate.
Are leg curls necessary?
If you do RDLs and other hip hinges, leg curls aren't strictly necessary but are highly recommended. RDLs train the hamstring through hip extension. Leg curls train through knee flexion. The hamstring performs both functions — train both for complete development.
Toes pointed or flexed?
Slightly dorsiflexed (toes toward shins) takes the calves out and puts more work on the hamstrings. Pointed toes let the calves assist. Dorsiflexed is recommended for hamstring isolation.
How many sets per week?
6-10 sets of direct hamstring curl work per week. Combine with hip hinge work (RDLs) for complete hamstring development.