Intermediate

Lying Dumbbell Leg Curl

When no curl machine is available, gripping a light dumbbell between your feet lets you train knee flexion lying face down on a bench. The load is modest and the balance takes practice, but it delivers direct hamstring tension you cannot get from hinges alone. Best treated as an accessory for high, controlled reps.

Equipment
Bench, Dumbbell
Body part
Hamstring
Type
Strength
Browse by movement
Knee Flexion
Muscles worked
Target
Biceps Femoris, Semitendinosus
Secondary
Gastrocnemius Medial Head, Gastrocnemius Lateral Head

How to do it

  1. 1

    Lie face down on a flat bench with your knees just past the edge.

  2. 2

    Have a partner or your own hands set a dumbbell securely between your feet.

  3. 3

    Pinch the handle firmly with your soles and ankles.

  4. 4

    Curl your heels toward your glutes by bending at the knees.

  5. 5

    Squeeze at the top, then lower under full control.

  6. 6

    Keep the dumbbell balanced throughout every rep.

Tips

  • Start very light until you trust your grip on the dumbbell.
  • Keep your hips pinned to the bench so the effort stays in the hamstrings.
  • Move slowly; a dropped dumbbell is the main risk here.

Variations

Common mistakes

  • Pinching the dumbbell with your toes gives you a grip that fails without warning. Trap the handle between the soles and squeeze the ankles together so the bell sits in a cradle.
  • Lying so far up the bench that your knees are still on the pad puts the hinge in the wrong place. Your kneecaps should sit just past the edge so the shins can swing freely.
  • Reaching back to grab the dumbbell yourself once you are face down twists your lower back at an awkward angle. Stand it upright at the end of the bench first, or have someone pass it.
  • Choosing a round dumbbell means it rolls the moment your feet tilt. A hex-shaped one sits still between the soles and turns a balancing act back into a leg exercise.
  • Setting up over bare, hard flooring leaves you nowhere to bail. Work over a mat, and lower your feet to the floor as soon as the grip starts to go rather than trying to save the rep.

Frequently asked

How many reps of the lying dumbbell leg curl should you do when you are new to the exercise?
Two or three sets of 12 to 15 with a light dumbbell; 5 to 10 kg is a realistic starting range, because what your feet can hold, not what your hamstrings can pull, sets the limit. Do a set with no weight first to check the bench height and the path. Add reps to 15, then take one small dumbbell jump, and end the set the moment the bell starts to tilt. Once or twice a week as an accessory is plenty.
What can I do instead of the lying dumbbell leg curl if I have no bench?
A banded prone leg curl on the floor is easier to set up and easier to control, with the band anchored behind your feet. A swiss-ball leg curl needs only a ball and trains the same knee flexion with a hip bridge on top. A Nordic curl with your heels wedged under a couch is the strongest home option, taken slowly with your hands ready. If a curl machine is available at all, use it: this variation exists because one is not.
What is the lying dumbbell leg curl good for and when should I skip it?
It is a fallback that gives you direct hamstring knee flexion with nothing but a bench and one dumbbell, and it loads the spine not at all. For high, controlled reps it does the job. Skip it whenever a curl machine, a band or a stability ball is available, since all three are easier to control and let you load more. It is also a poor choice if you train alone with heavy dumbbells over a hard floor, because the whole exercise depends on a grip that fades as the set goes on.

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