Exercise guide
Standing Single Leg Curl
- Beginner
- Isolation
- Rep-based
- Lower legs
- Upper legs
This unilateral isolation exercise targets the hamstrings by focusing on knee flexion, improving mind-muscle connection and balance without the need for specialized equipment.
Reviewed by the Crucible team · Updated June 2026
Muscles worked
Setup
- Stand facing a wall or sturdy object for balance, placing your hands on it at shoulder height.
- Shift your weight onto your standing leg, keeping a slight bend in the knee to avoid locking it.
- Position the working foot slightly off the ground, ensuring both knees are aligned and parallel to each other.
How to do it
- Exhale as you curl your heel toward your glutes, moving only at the knee joint while keeping the thigh stationary.
- Squeeze your hamstrings at the peak of the contraction for a one-second pause.
- Inhale as you slowly lower your foot back toward the floor using a controlled 2-3 second tempo.
- Complete all repetitions on one side before switching to the other leg.
Form checklist
- Keep your torso upright and avoid leaning forward into the wall.
- Ensure the working knee does not drift forward or backward during the curl.
- Keep your hips square and avoid rotating the pelvis toward the working side.
- Flex your foot (toes toward shin) to maximize hamstring tension and minimize calf dominance.
Pro tips
- Focus on 'internal resistance' by imagining you are pulling your heel through thick mud to increase muscle fiber recruitment.
- Press the hip of the working leg slightly forward to ensure the hamstring is fully shortened at the top.
Make it harder
- Perform the movement without holding onto the wall to significantly challenge your balance and core stability.
- Add a 3-second isometric hold at the top of every repetition to increase time under tension.
Frequently asked
- What muscles does the standing single leg curl work?
- The standing single leg curl primarily targets the hamstrings, and also works the glutes as secondary muscles.
- What equipment do you need for the standing single leg curl?
- The standing single leg curl requires no equipment — just your body weight.
- Is the standing single leg curl good for beginners?
- Yes. The standing single leg curl is a beginner-friendly movement and a strong foundation to build on.
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- Air Pillow Balance Counterbalanced Skater SquatAdvanced · glutes, hamstrings, and quadriceps