Back · Hinge
Hyperextensions
Hyperextensions, also called back extensions, are done on a 45-degree or horizontal bench with your hips supported and feet anchored. You lower your torso towards the floor, then raise it back to a straight line. They train the spinal erectors, glutes and hamstrings, and are one of the safest ways to strengthen the lower back.
Also known as: Back extensions, 45-degree back extension, Roman chair back extension, Hyperextension
- Muscle group
- Back
- Movement pattern
- Hinge
- Type
- Compound
- Equipment
- Hyperextension bench
- Difficulty
- Beginner
What muscles does the hyperextensions work?
Primary movers
- Spinal erectors
- Gluteus maximus
Assisting muscles
- Hamstrings
- Multifidus
There are really two exercises hiding under one name. If you keep the spine neutral and hinge at the hips, the glutes and hamstrings do most of the work while the spinal erectors hold the back straight. If you round the upper back on the way down and curl it back up, the spinal erectors move the spine and become the main target.
The hip-hinge version works the glutes and hamstrings much like a Romanian deadlift, but without loading the spine from above. That makes it a valuable accessory for anyone whose deadlift or squat is limited by hip extension strength.
The spinal-flexion version builds endurance and strength in the erector spinae, the muscles that run either side of the spine. Strong erectors help you hold position in heavy squats and deadlifts.
Foot position changes the emphasis too. Turning the toes out and pushing the hips into the pad tends to bias the glutes. A neutral stance with the pad lower on the thighs puts more emphasis on the hamstrings and lower back.
How to do the hyperextensions
Setup
- 1
Adjust the pad so its top edge sits just below your hip crease, letting you bend freely at the hips.
- 2
Step into the bench and hook your heels under the foot rollers.
- 3
Start with your body in a straight line from head to heels.
- 4
Cross your arms over your chest, or hold a plate there once bodyweight becomes easy.
Execution
- 1
Hinge at the hips to lower your torso towards the floor, keeping your back flat.
- 2
Lower until you feel a stretch in the hamstrings, usually with the torso near vertical to the floor.
- 3
Squeeze your glutes to drive your hips into the pad and raise your torso.
- 4
Stop when your body forms a straight line. Do not arch past it.
- 5
For lower back emphasis, let the upper back round slightly at the bottom and curl up vertebra by vertebra.
- 6
Control the descent over two seconds on every rep.
Common hyperextensions mistakes
Overextending at the top
Arching the lower back hard past a straight line at the top of each rep, as the name suggests. It compresses the lumbar spine and adds no useful muscle work.
The fix: Finish with your body in a straight line from head to heels, with glutes squeezed and ribs down.
Pad set too high
The pad sits on the stomach, blocking the hips from bending. The movement then has to come from the spine, which defeats the glute and hamstring version.
The fix: Lower the pad until the top edge sits just below the hip crease.
Swinging up with momentum
Dropping quickly and bouncing back up, which takes tension off the target muscles and jolts the lower back.
The fix: Lower slowly, pause briefly at the bottom and raise yourself with control.
Holding weight too high
Holding a plate behind the head or overhead too early, which lengthens the lever dramatically and makes form fall apart.
The fix: Add load by holding a plate against your chest first. Move it further out only once that becomes easy.
How many sets and reps?
| Goal | Sets | Reps | Load | Rest |
|---|---|---|---|---|
| Glute and hamstring hypertrophy | 3 | 10–15 | Bodyweight or plate, 1–2 RIR | 60–90 s |
| Lower back endurance | 2–3 | 15–20 | Bodyweight | 60 s |
| Strength accessory | 3 | 8–12 | Weighted | 90 s |
Hyperextensions are a low-risk way to train hip extension and lower back endurance, which makes them a good accessory after deadlifts or squats or a safe primary hinge for beginners. Start with bodyweight for sets of 15 and add load gradually. Choose the hip-hinge style for glutes and hamstrings, or the rounding style for lower back endurance, and be clear which one you are doing.
Running the hyperextensions in your next block? Hercules logs every set, shows last session's numbers before you lift, and suggests when to add weight.
Get it on Google PlayHyperextensions variations and alternatives
Romanian Deadlift
HarderThe same hip hinge under a barbell. Much heavier loading for the hamstrings and glutes, with more spinal demand.
Seated Back Extension Machine
EasierA seated machine that isolates spinal extension with a fixed path and easy load adjustment.
Barbell Good Mornings
HarderThe hinge with a bar on your back, loading the hamstrings and spinal erectors heavily.
Reverse Hyperextension
AlternativeYour torso stays fixed while the legs swing up, training the glutes with traction rather than compression on the spine.
Cable Pull-Through
AlternativeA standing hip hinge with constant cable tension that teaches glute-driven lockout.
Frequently asked questions
What muscles do hyperextensions work?
The spinal erectors, glutes and hamstrings. A flat-back hinge puts more emphasis on the glutes and hamstrings, while rounding and uncurling the spine puts more emphasis on the lower back.
Are hyperextensions good for lower back pain?
Done with control and without arching at the top, they are one of the gentler ways to strengthen the lower back, and they are commonly used in rehabilitation. If you have current back pain, get it assessed before loading the movement.
What is the difference between a hyperextension and a back extension?
They are the same exercise. Hyperextension is the traditional gym name, but you should not actually hyperextend the spine at the top. Back extension is the more accurate name.
How do I target my glutes with back extensions?
Set the pad just below your hips, turn your feet out slightly, keep your back flat and drive your hips into the pad by squeezing your glutes. Stop at a straight line rather than arching.
How do I add weight to hyperextensions?
Hold a weight plate or dumbbell against your chest. As you get stronger, hold it further from your body or use a loaded barbell across the upper back. Increase lever length before chasing much heavier weights.
Hercules tracks every hyperextensions you log, shows you last session's numbers before you lift, and flags when your progress stalls.
Get it on Google Play