Exercise Guide
How to do machine lying leg curl
Master the setup, range of motion, and tempo for safer, more effective reps.
Overview
This exercise focuses entirely on the back of the leg. By lying flat, you keep your hips still, which forces the hamstrings to do all the work of moving the weight. It is an essential movement for balancing out the strength of your quads and keeping your knee joints healthy and stable.
Why Use It
- Directly isolates the hamstrings for better muscle growth.
- Strengthens the tendons around the knee.
- Provides a deep stretch and peak contraction.
When to Use It
Use this after your heavy compound lifts like squats or leg presses as a finisher for leg day.
Stats
Instructions for Proper Form
Setup
- The Pad: Adjust the ankle pad so it sits right on the back of your lower calves, just above your shoes.
- Alignment: Lie down and ensure your knees are perfectly lined up with the machine's pivot point.
Execution
- The Curl: Pull your heels toward your glutes while keeping your hips pressed into the bench.
Pro Tip: Keep your feet neutral. If you flex your toes toward your shins too hard, your calves will take over the work.
- The Descent: Slowly lower the weight back down over a 3-second count.
Coaching Cues
- Belt buckle into the pad
- Heels to glutes
- Slow on the way down
Common Mistakes
- Hips Popping Up: Lifting your hips off the pad to use momentum.
- Going Too Fast: Dropping the weight quickly on the way down.
- Kicking the Weight: Using a jerk to start the rep.
How to Fix It
- Hips Popping Up: Focus on pressing your hips into the pad as if you are trying to crush it.
- Going Too Fast: Count to three on every lowering phase to ensure the hamstrings stay under tension.
- Kicking the Weight: Start the movement with a slow, deliberate squeeze rather than an explosive kick.
Mistakes by Level
Beginner
- Incorrect pad placement.
- Not using a full range of motion.
Intermediate
- Lifting the hips to finish the rep.
- Using the calves too much.
Advanced
- Losing control during the last few inches of the lowering phase.
Mechanics
Use these setup and execution anchors to keep the rep organized, repeatable, and easier to progress.
Movement Pattern
Isolation
Body Position
Prone
Load Style
Machine Guided
Muscles Worked
Primary
- Hamstrings
Secondary
- Calves
Stabilizers
- Core
Setup Requirements
- Adjust the lever arm so the pad sits just above your heels.
- Align your knees with the pivot point of the machine.
Form Checklist
- Are your knees lined up with the machine's hinge?
- Are your hips staying down on the pad?
- Are you controlling the weight on the way down?
Range of Motion
Curl the weight up toward your glutes; lower slowly until legs are almost straight.
Breathing Pattern
Exhale as you curl up; inhale as you lower back down.
Tempo Guidance
1 second curl, 3 second return.
Caution Notes
- If your lower back starts to arch, the weight is too heavy.
Programming
Treat these guidelines as practical programming defaults, then scale load, volume, and frequency to match the rest of the training week.
Best For
- Hypertrophy
- General fitness
Goal Tags
Rep Ranges
- 10-15 reps for muscle growth.
- 15-20 reps for endurance.
Set Guidance
3 sets.
Rest Guidance
60 seconds.
Frequency
2 times per week.
Pairings
- Leg extensions
- Romanian deadlifts
Audience Notes
- Crucial for runners and athletes to keep the hamstrings strong.
Substitution Targets
- Seated leg curl
- Nordic hamstring curl
Variations
Use progressions to increase difficulty when you master the movement, and regressions if you struggle with proper form or face mobility limitations.
Regressions
Single Leg Lying Curl
Focusing on one leg helps ensure both hamstrings are doing equal work.
Best for: Fixing imbalances.
Progressions
Slow Eccentrics
Hamstrings respond well to slow lowering phases.
Best for: Maximum hypertrophy.
FAQ
Common Questions
Should I point my toes or flex them?
A neutral foot position is usually best. Pointing your toes can help isolate the hamstrings more by taking the calves out of the movement.
Alternatives
Start with the closest related options, then browse fallback alternatives that keep the same primary training focus.