ExercisesStrength Training — Machines
Glute Ham Raise: A Complete Guide
Also called GHR, Natural Leg Curl, GHD Leg Curl
Quick Intro
Glute Ham Raise, also called the GHR, Natural Leg Curl or GHD Leg Curl, is a machine-based strength training exercise performed kneeling on a glute ham developer, lowering the body from upright to horizontal under hamstring control before pulling back up. It trains the hamstrings through knee flexion while they’re already lengthened at the hip, a combination that makes it effective for both strength and hamstring injury prevention.
Equipment Needed
A Glute Ham Developer is required. No other equipment is needed.
Why It Matters
The hamstrings have to control and then reverse the lowering of most of the bodyweight, which makes this a strength exercise first. The back of the thigh (biceps femoris and semitendinosus) leads the effort, with support from the largest glute muscle (gluteus maximus), the muscles running along the spine (erector spinae) and the calf (gastrocnemius). Keeping the hips fully extended throughout and initiating the movement by pulling with the hamstrings, and not bending forward at the hips, is what makes this exercise effective and distinct from a standard leg curl.
When to Do It
Glute Ham Raise works well on a posterior chain or hamstring-focused day, either as a primary hamstring builder or as targeted injury-prevention work alongside sprinting or jumping training. Once or twice a week, with full recovery between sessions, suits most people given the exercise’s difficulty.
Anyone with a current hamstring issue should get individual guidance before starting this exercise, since it’s demanding even for experienced trainees and easy to underestimate.
Getting Ready
A few minutes of light hip hinges or leg swings warms the hamstrings up before attempting the full movement. Starting with a partial range or added assistance previews how the pulling action feels before working sets begin.
Step-by-Step Instructions
1. The setup. Kneel on the pad with the ankles secured and the hips positioned at the pivot point, torso upright.
2. The starting position. Start upright with the hips fully extended, core braced.
3. The lower. Lower the torso toward horizontal under hamstring control, keeping the hips extended throughout.
4. The pull. Pull the body back to upright using the hamstrings, without bending forward at the hips to assist.
How Many, How Often
Glute Ham Raise is dosed by reps and sets, with progression coming from adding range, reducing assistance or slowing the tempo before adding external weight.
| Level | Where you’re at | What to do |
|---|---|---|
| Beginner | New to a glute ham raise | 3 sets of 3 to 5 reps with a partial range or hand assistance from the floor |
| Intermediate | Comfortable completing a controlled full-range lower | 3 sets of 6 to 8 reps through a full range without assistance |
| Advanced | Confident with strict full-range reps | 3 to 4 sets of 8 to 12 reps, or add light weight for extra resistance |
A hamstring-led pull matters more here than the number of reps completed, since bending forward at the hips to assist the pull trains a different, less effective pattern.
Modifications and Variations
As an alternative with different equipment, Nordic Hamstring Curl trains the same lengthened-hamstring knee flexion pattern without needing a glute ham developer, using a partner or anchor to hold the ankles.
As an easier option, Lying Leg Curl isolates knee flexion on a machine, removing the hip-extension and balance demands this exercise requires.
As a different technique with a shifted muscle emphasis, Romanian Deadlift trains the hamstrings through hip extension with the knees only slightly bent.
Common Mistakes to Avoid
Bending forward at the hips to help the pull. Hinging at the hips turns this into more of a back extension than a hamstring exercise. Keeping the hips locked in extension throughout isolates the hamstrings the way this exercise is built to.
Rushing through the lowering phase. Dropping quickly toward horizontal skips the eccentric loading that makes this exercise so effective for injury prevention. A slow, controlled lower builds more strength than a fast one.
Attempting a full range too soon. Jumping straight into unassisted full-range reps before the hamstrings are ready is how this exercise most often leads to a strain. Starting with a partial range or hand assistance and building up gradually keeps the hamstrings protected.
After Your Set
Standing and pulling one heel toward the glutes stretches the front of the thigh after a set of glute ham raises. Sitting and folding forward over both legs finishes stretching the hamstrings and lower back.
Going Deeper
Glute Ham Raise suits people training hamstring strength and injury resilience, since it loads the hamstrings at the hip and the knee at once. The exercise is hard even in its easiest form, so it’s tempting to substitute a hip hinge for the hamstring-led pull, which trains a different pattern and loses much of the injury-prevention benefit. Keeping the pull in the hamstrings, with less range or more assistance if needed, gets past a plateau sooner than pushing through with worse form.
Someone new to this exercise typically starts with significant assistance and works toward a controlled, partial-range rep within the first few sessions, then builds toward a full unassisted range over eight to twelve weeks as the hamstrings adapt to this demanding pattern.
How to Know You’re Improving
- A pull driven by the hamstrings, not a hip hinge
- Hips that stay fully extended throughout the movement
- A controlled, even pace on the lowering phase
- Less assistance needed to complete a full range of motion
A hamstring-led pull through a growing range shows progress more reliably than the rep count.
Muscles Worked
- Biceps Femoris (the outer hamstring at the back of the thigh, holding the body back against gravity on the way down)
- Semitendinosus (the inner hamstring at the back of the thigh, pulling the torso back upright from the horizontal position)
- Gluteus Maximus (the largest glute muscle, keeping the hip straight so the movement happens at the knee)
- Erector Spinae (the muscles running along the length of the spine, stopping the back from sagging as the body passes through horizontal)
- Gastrocnemius (a calf muscle, pressing the toes into the platform to anchor the lower leg)
FAQ
Is Glute Ham Raise better than a Lying Leg Curl? Neither is strictly better. This version trains the hamstrings through both hip extension and knee flexion at once, a combination linked to injury prevention, while Lying Leg Curl isolates knee flexion in a more accessible, machine-guided way, and many programs use both.
Why is this exercise considered so effective for hamstring injury prevention? Training the hamstrings while they’re lengthened at the hip and contracting through the knee is close to what the muscle does late in a sprint stride, as the leg swings forward, which is when many hamstring strains happen.
How does the Nordic hamstring curl differ? Nordic Hamstring Curl trains a similar lengthened-hamstring pattern without a glute ham developer, using a partner or anchor to hold the ankles, while this version uses a dedicated machine that also supports the hips through the movement.
Is some hamstring soreness after this exercise normal? Yes, significant soreness after this exercise is common, especially for anyone newer to training the hamstrings through this lengthened range. A sharp, sudden pain during a rep is different and worth stopping immediately and having a doctor or physical therapist look at.
How long does it take to build up to a full unassisted range? Most people need eight to twelve weeks of consistent, gradually progressed training to move from an assisted partial range to a controlled, unassisted full range, given how demanding this exercise is.
Related to Lying Leg Curl as the easier option, with Nordic Hamstring Curl and Romanian Deadlift as alternatives.