Hips lifting off the pad
Reduce the weight and keep hips pressed down so the hamstrings, not the lower back, do the work.
Isolation · Machine
The lying leg curl is a machine exercise where you lie face down and curl a padded lever toward your glutes. It isolates the hamstrings at the knee and suits anyone adding direct hamstring work alongside hinges.
The hamstrings flex the knee, with the calves (gastrocnemius) contributing somewhat. Pointing your toes reduces the calf's role and keeps more work on the hamstrings.
Reduce the weight and keep hips pressed down so the hamstrings, not the lower back, do the work.
Control both directions and pause at the top.
Lower to nearly straight legs each rep for a full stretch.
Surpass starts the lying leg curl at 10–15 reps with about 1 reps in reserve. As an isolation exercise it fits well after your main compound lifts.
Work in 10-15 reps and add one pin when every set reaches the top of the range. Slow negatives help when stack jumps are large.
Surpass shows what you lifted last time beside a target for this set, and adjusts it from your reps and RIR. Free on iPhone, no account needed.
These train the same main muscles. Swap when the equipment is busy, something hurts, or progress has stalled for several weeks.
Both train the hamstrings well. The seated version keeps the hamstrings more stretched at the hip, which may be slightly better for growth, but use whichever you have and feel.
RDLs train hamstrings at the hip; leg curls train them at the knee. Doing both covers both functions of the muscle.