The slide hamstring curl is a floor exercise that curls the heels toward the hips on sliders while holding a bridge, loading the hamstrings without a machine. The hips stay lifted for the whole set, so the hamstrings work at both ends: holding the hip extended and bending the knee. It is the cheapest way to train knee flexion, and it exposes a weak side quickly when one heel drags behind the other.
Muscles Targeted
- Primary: hamstrings (biceps femoris, semitendinosus)
- Secondary: gluteus maximus, calves
- Tertiary: erector spinae, abs, adductors
Starting Position
Lie on your back on a smooth floor with a slider, towel, or paper plate under each heel. Keep your legs nearly straight with a slight bend at the knees, arms at your sides and palms down. Press through your heels and lift your hips until your body forms a straight line from shoulders to knees. Brace your abs.
Execution Steps
- Lift the hips into a bridge and hold them there before the heels start to move.
- Pull both heels toward your hips by bending the knees, keeping the hips high.
- Drag the sliders smoothly rather than letting them skip or catch on the floor.
- Stop when your knees reach roughly 90 degrees and the hips are at their highest.
- Push the heels back out slowly, resisting the slide the whole way to straight legs.
- Stop just before the hips touch down, then start the next rep from there.
Form Cues
- Keep the hips up: dropping them turns the exercise into a floor slide with no hamstring load.
- Pull with the heels: digging the heels in keeps the hamstring on the work, not the calf.
- Move both legs at the same speed so the stronger side cannot lead.
- Squeeze the glutes throughout to hold the bridge at full height.
- Breathe steadily instead of holding your breath for the whole set.
Common Mistakes
- Letting the hips sag on the way out: the extension phase is where hamstrings cramp, and a dropped hip is the sign.
- Rushing the return: sliding back fast skips the eccentric, which is the most valuable part of this exercise.
- Bending at the hips instead of the knees: folding the body shortens the range and takes the load off.
- Working on a grippy floor: carpet or rubber makes the sliders catch, which jerks the knee joint mid-rep.
- Starting with both legs when the range is unfamiliar: use a bent-knee regression rather than fighting a cramp.
Variations
- Bent-knee slide curl: starting from a shorter range makes the first sessions manageable.
- Single-leg slide curl: one leg at a time doubles the load and finds the weaker side.
- Stability ball leg curl: a ball replaces the sliders and adds a balance demand.
- Nordic curl: the hardest bodyweight knee flexion movement, with a much longer lever.
- Machine leg curl: a fixed path with a load you can select in small steps.
Tips for Progression
- Build to 10 to 12 reps with the hips high before you go single-leg.
- Slow the extension phase to a three-count before adding reps.
- Add a two-second hold with the knees bent and the hips at full height.
- Move to single-leg sets rather than adding external load.
Training Notes
Program the slide hamstring curl at the end of a lower body session, for 3 sets of 8 to 12 reps with 60 seconds of rest. Once or twice a week is enough, since hamstring cramps are common in the first weeks. It pairs well with a Romanian deadlift, which loads the hamstring at the hip while this exercise loads it at the knee.