Ball Leg Curl

🎯 Hamstrings🏋️ Exercise ballBeginnerIsolationCalves (2°)Glutes (2°)

How to do the ball leg curl

  1. Begin on the floor laying on your back with your feet on top of the ball.
  2. Position the ball so that when your legs are extended your ankles are on top of the ball. This will be your starting position.
  3. Raise your hips off of the ground, keeping your weight on the shoulder blades and your feet.
  4. Flex the knees, pulling the ball as close to you as you can, contracting the hamstrings.
  5. After a brief pause, return to the starting position.

Muscles worked

The prime movers are the hamstrings, which extend the hip and bend the knee, frequently at both joints in the same repetition.

Even with a single joint doing the moving, the muscle is not working alone — the calves control the ankle and hold the heel position; the glutes finish hip extension.

Every exercise for:HamstringsCalvesGlutes

How this movement works

One joint changes angle and the resistance travels toward you along a single arc. Nothing is positioned to help, so tension stays where you aimed it and the usable load drops sharply against a multi-joint pull for the same muscle. Protect the range of motion; buying weight by shortening the arc defeats the point.

It is filed under strength: produce force against resistance for a countable number of repetitions, and progress the resistance over time.

What you need

The exercise ball is an unstable base on purpose. It shortens the leverage you can hold and demands constant small corrections, so the trunk works even when the movement is aimed elsewhere.

Every exercise using:Exercise ball

These train the hamstrings too, using equipment this one does not:

Difficulty

Listed at beginner level: the pattern is simple enough to pick up without coaching, and a position that goes wrong mid-set is obvious enough to correct on the next repetition.

Of the 86 hamstrings exercises in this database, 37 are listed at beginner level.

Related exercises

Photos: free-exercise-db — public domain (Unlicense) Full attribution →

ⓘ Informational only — not a substitute for professional fitness or medical advice.