The iso ham raise is a beginner-to-intermediate lower body exercise where you lie on your back with your heels on a bench, then drive your hips up into a straight-line bridge while squeezing your glutes and hamstrings. Primary muscles are the hamstrings and gluteus maximus; secondary muscles include the lower back stabilizers and core. The elevated foot position shifts more of the load onto the hamstrings compared to a standard floor glute bridge. Research shows hip bridge variations produce some of the highest gluteus maximus EMG activity of any bodyweight movement (Contreras et al., 2015), making this a highly efficient posterior chain exercise for people training at home.
Most people looking to build their hamstrings jump straight to Romanian deadlifts or machine curls. Both are great — but both also require equipment, a hinge pattern, and some technique you might not have yet. The iso ham raise skips all of that. You lie down, put your heels on a bench, and drive your hips up. That is the whole thing.
The "iso" in the name refers to the isometric hold at the top of each rep — a short pause where the muscles work hardest. The bench elevation is what separates this from a standard glute bridge. Raising your heels above the floor increases the knee flexion angle, which biases the hamstrings over the glutes.
That matters because the hamstrings are one of the most commonly undertrained muscle groups in home workouts. They need knee-flexion work and hip-extension work, and the iso ham raise quietly checks both boxes in one move.
Quick Facts
| Movement Type | Compound (hip extension with knee flexion) |
| Primary Muscles | Hamstrings, Gluteus Maximus |
| Secondary Muscles | Gluteus Medius, Core, Lower Back |
| Category | Strength — Lower Body |
| Equipment | Bench, chair, or elevated surface |
| Difficulty | Beginner-Intermediate |
Step-by-Step: How to Do an Iso Ham Raise
- Lie down on your back. Find a sturdy bench or chair about 12-18 inches high. Lie with your head on the floor and place both heels on top of the bench. Your knees should bend to about 90 degrees and your calves should roughly parallel the bench surface.
- Plant the heels. Drive your heels firmly into the bench. This is not optional — it creates the stable base your glutes and hamstrings will push off from. If the bench wobbles, move it.
- Relax the arms. Keep your arms flat on the floor at your sides, palms down. They are there for balance, not lifting. Do not push through your hands.
- Brace the core. Take a short breath into your belly and lightly tense your abs. Keep your eyes on the ceiling so your neck stays neutral.
- Drive the hips up. Push through your heels and lift your hips toward the ceiling. Stop when your body forms a straight line from your knees down through your hips to your shoulders. Both hips should move together.
- Squeeze and hold. At the top, squeeze your glutes like you are trying to crush a walnut between them. Hold for 1-2 seconds. This is where the iso in "iso ham raise" earns its name.
- Lower slowly. Take 2-3 seconds to return your hips to the floor. Resist gravity the whole way down — that eccentric portion is where a lot of the hamstring work actually happens. Inhale on the way down, exhale on the way up.
Common Mistakes (And How to Fix Them)
One Hip Drops Lower
What it looks like: At the top of the rep, one side of the pelvis sits lower than the other, so your bridge is uneven.
Why it's a problem: Shifts the load onto one side and reinforces an existing imbalance. Over time the weaker side stays weak.
The fix: Think about your hip bones as the two ends of a broomstick. They should rise together, stop together, and lower together. If one side keeps dropping, drop to single-leg iso ham raises to train each side independently.
Overextending the Lower Back
What it looks like: You push so high that your lower back arches dramatically and your ribs flare up.
Why it's a problem: The glutes and hamstrings stop doing the work. Your lower back takes over, and that is a fast route to soreness in all the wrong places.
The fix: Stop when your body forms a straight line from knees to shoulders — not a banana shape. Before you lift, exhale and tuck your ribs toward your pelvis. That locks the spine in neutral.
Pushing Through the Toes
What it looks like: Heels lift off the bench as you drive up, and you end up pressing through the balls of your feet.
Why it's a problem: Shifts the work away from the hamstrings and toward the quads and calves. You lose most of the point of this exercise.
The fix: Actively drive your heels down into the bench like you are trying to drag them back toward your butt. Lift your toes slightly off the bench surface if you have to — it makes the heel drive automatic.
Using Momentum
What it looks like: Rapid, bouncy reps where the hips barely pause at the top or bottom.
Why it's a problem: Momentum steals the tension. You get to call it a workout, but your hamstrings and glutes barely work.
The fix: Slow everything down. 2 seconds up, 1-2 second squeeze at the top, 2-3 seconds down. If you can do 20 reps this way without burning, you are still going too fast.
Get this exercise in a personalized workout
FitCraft's AI coach Ty programs iso ham raises into plans built for your fitness level, equipment, and goals.
Take the Free Assessment Free • 2 minutes • No credit cardVariations
Easier (Regression)
- Standard Glute Bridge. Feet flat on the floor instead of elevated on a bench. Easier on the hamstrings and a better place to start if you are brand new to hip extension work.
- Partial Glute Bridge. Lift only halfway. Builds confidence and lets you focus on the squeeze before adding full range.
Harder (Progression)
- Single-Leg Iso Ham Raise. Keep one heel on the bench, extend the other leg toward the ceiling, and drive up using only one side. Doubles the load on the working leg and exposes side-to-side imbalances.
- Weighted Iso Ham Raise. Place a dumbbell, plate, or loaded backpack across your hips. Hold it steady with your hands. Even 10 pounds makes a big difference.
Alternative Exercises
- Romanian Deadlift. Trains the same muscles through a different pattern (hip hinge instead of supine bridge). Better for carrying strength into real-world movements.
- Single-Leg Deadlift. Loads the hamstrings and glutes while also training balance. Progressive next step once iso ham raises feel too easy.
Programming Tips
- Sets x Reps: Beginner: 2x10-12 / Intermediate: 3x12-15 / Advanced: 3-4x10 single-leg or weighted
- Rest Period: 45-90 seconds between sets
- Frequency: 2-3 times per week on lower body or posterior chain days
- When in your workout: Use as an accessory after your main compound work (squats, deadlifts, or rear lunges). Also works well as a warmup for posterior chain activation.
FitCraft's AI coach Ty automatically programs iso ham raises into your personalized plan based on your equipment and experience. The app includes 3D demonstrations so you can dial in the setup before your first rep.
Frequently Asked Questions
What muscles does the iso ham raise work?
The iso ham raise primarily targets the hamstrings and gluteus maximus. Secondary muscles include the gluteus medius, lower back stabilizers, and core. Because the feet are elevated on a bench, the hamstrings handle more of the load than a standard floor glute bridge.
Why elevate the feet on a bench?
Elevating the heels on a bench increases the knee flexion angle and shifts more of the work onto the hamstrings. A standard glute bridge performed with feet flat on the floor emphasizes the glutes. The iso ham raise variation is specifically designed to bias the hamstrings.
Is the iso ham raise a good hamstring exercise for beginners?
Yes. It is one of the most accessible hamstring exercises for beginners because it requires no equipment beyond a bench or chair and puts minimal stress on the spine. It is also safer than a Romanian deadlift for people still learning the hip hinge pattern.
How many iso ham raises should I do?
Beginners should aim for 2-3 sets of 10-12 reps with a 1-2 second squeeze at the top. Intermediate athletes can progress to 3-4 sets of 12-15 reps or add a single-leg variation for added challenge.
Can the iso ham raise replace the Romanian deadlift?
Not entirely. The iso ham raise is excellent for hamstring and glute activation, but it does not train the hinge pattern the same way a Romanian deadlift does. Use the iso ham raise as a warmup, accessory, or beginner substitute — not a direct replacement.