Lever Lying Single Leg Curl exercise animation (Male)

Lever Lying Single Leg Curl

Target muscle
Hamstrings
Synergist muscles
Gastrocnemius, Sartorius, Soleus
Equipment
Leverage machine
Body part
Thighs
Type
Strength

The Lever Lying Single Leg Curl is a unilateral machine exercise that isolates one hamstring at a time, with the gastrocnemius, sartorius, and soleus acting as synergists. Training each leg independently makes it effective for identifying and correcting strength imbalances between sides, and the fixed lever path of the lying leg curl machine keeps the movement consistent and controlled.

How to do the Lever Lying Single Leg Curl

  1. 1Adjust the leg curl machine so that the pad aligns just above your heel when you lie face down with your knee at the edge of the bench.
  2. 2Lie face down on the bench, positioning your left leg under the pad while keeping your right leg relaxed and out of the way beside the machine or resting lightly on the bench.
  3. 3Grip the handles on the sides of the bench and press your hips firmly into the pad to anchor your pelvis throughout the set.
  4. 4Take a breath and brace your core to prevent your hips from lifting as you curl.
  5. 5Curl the pad upward by flexing your knee, driving your heel toward your glute in a smooth, controlled arc.
  6. 6Pause briefly at the top of the curl when your knee is fully flexed, squeezing the hamstring against the peak contraction.
  7. 7Lower the pad back to the starting position in a controlled manner over 2–3 seconds, resisting the weight on the way down.
  8. 8Complete all reps on the first leg, then switch legs and repeat the set with the other side.
  9. 9Match the rep count and range of motion on both sides to train symmetrically.

Form tips

  • Keep your hips pressed into the bench pad throughout — if they lift during the curl, the load is too heavy or your core is not braced.
  • Point your toes slightly toward your shin (dorsiflexion) during the curl to place the gastrocnemius on a slight stretch and shift more emphasis onto the hamstrings.
  • Control the eccentric (lowering) phase deliberately rather than dropping the pad — the descent is where a significant portion of the muscle-building stimulus occurs.
  • Start with your non-dominant or weaker leg first so you do not let fatigue from the stronger side cap what you do on the weaker side.

Common mistakes

  • Letting the hips rise off the pad during the curl — this recruits the lower back and glutes to assist, reducing hamstring isolation and placing stress on the lumbar spine.
  • Using too much weight and shortening the range of motion — stopping the curl before full knee flexion removes the peak contraction and limits the training stimulus on the hamstring.
  • Dropping the pad on the eccentric phase — releasing control of the weight on the way down eliminates eccentric tension, which is one of the most effective stimuli for hamstring hypertrophy.
  • Training both legs to the same rep count when a strength imbalance exists — always match the weaker leg's capacity rather than the stronger one, or the imbalance will persist.
  • Placing the pad too high (above mid-ankle) or too low (on the Achilles tendon) — incorrect pad placement can cause discomfort at the ankle and reduce the lever arm effectiveness of the curl.

Frequently asked questions

What muscles does the Lever Lying Single Leg Curl work?

The primary target muscle is the hamstrings (biceps femoris, semimembranosus, and semitendinosus). The synergist muscles that assist the movement are the gastrocnemius, sartorius, and soleus.

What is the difference between the Lever Lying Single Leg Curl and the standard lying leg curl?

The single-leg version trains one hamstring at a time rather than both simultaneously. This exposes and addresses strength imbalances between legs that the bilateral version can mask, since the stronger leg often compensates for the weaker one. Unilateral training also increases the neuromuscular demand per leg and can help bring a lagging hamstring up to parity.

Is this exercise suitable for beginners?

Yes. The lying leg curl machine guides the movement path, removing balance demands and making it straightforward to learn. Beginners should start with a light load to practice keeping the hips down, controlling the full range of motion, and moving through the eccentric phase under control before adding more weight.

How many sets and reps should I do?

For hypertrophy, 3–4 sets of 10–15 reps per leg with a moderate load and 60–90 seconds of rest between sides is a practical starting point. For strength, 3–4 sets of 6–8 reps with a heavier load and longer rest (2 minutes) works well. Because you are training each leg individually, total training volume per session is higher than the bilateral equivalent — factor that into your overall leg volume.

How do I know if I have a hamstring imbalance between legs?

Perform the same number of reps with the same weight on each leg. If one side fatigues noticeably sooner, requires a shorter range of motion to complete reps, or produces noticeably more discomfort, that side is likely weaker. A common guideline is that a side-to-side strength difference greater than 10–15 percent is worth addressing with unilateral exercises like this one before returning to heavier bilateral training.

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