Hyperextensions (Back Extensions)
Hyperextensions, often called Back Extensions, train your lower back, glutes, and hamstrings on a hyperextension bench that lets your hips hinge through a full range while your legs stay anchored. You lower your torso toward the floor under control, then extend back up using your posterior chain rather than momentum. It's a staple for building a resilient lower back and reinforcing a strong hip hinge pattern.
Why it works
The hyperextension bench pins your legs and hips in place while leaving your torso free to hinge forward and back, which isolates the muscles along your spine and through your glutes and hamstrings far more directly than a standing deadlift pattern does. Because gravity provides the resistance as you lower down, and your own posterior chain has to pull you back up, the exercise trains the same muscles that keep your spine stable and your hips extending under load during heavier lifts, without needing any weight in your hands to start. That makes it a useful accessory for anyone building toward a bigger deadlift or squat, since a stronger, more resilient lower back holds its position better when the bar gets heavy, and it works just as well as a standalone move for building general trunk endurance if heavy lifting isn't the goal.
Set up
- Adjust the pad so your hips rest just above it, letting your torso hinge freely.
- Secure your ankles under the footpads or rollers.
- Cross your arms over your chest or place your hands behind your head.
How to do it
- Start with your body in a straight line from head to heels.
- Slowly bend forward at the hips, lowering your torso toward the floor.
- Stop once you feel a stretch through your hamstrings and lower back, without rounding your spine.
- Squeeze your glutes and lower back to extend your torso back up.
- Stop when your body is straight again; don't hyperextend past a neutral spine.
- Repeat for the target number of reps, keeping the pace controlled throughout.
Form cues
- Hinge from your hips, not by rounding your lower back.
- Keep your neck in line with your spine instead of craning it up.
- Squeeze your glutes hard at the top of each rep.
- Move at a controlled pace instead of swinging up with momentum.
Breathing: Inhale as you lower your torso down, and exhale as you extend back up to the top.
Common mistakes
Hyperextending the spine past neutral at the top
Fix: Stop once your body forms a straight line; arching further loads the lower back joints without adding useful range.
Using momentum to swing back up
Fix: Slow the movement down and drive up with your glutes and hamstrings instead of rocking your torso.
Rounding the lower back at the bottom of the movement
Fix: Bend only to the point where your spine stays straight; a rounded lower back shifts stress onto the discs instead of the muscles.
Locking the knees completely on the pad
Fix: Leave a small amount of bend in your knees; fully locked legs make it harder to keep the hips hinging smoothly through the movement.
How to program it
- 3 sets of 10 to 15 reps works well for building lower back endurance and control.
- Pairs naturally with deadlifts or squats as a lighter accessory movement, or fits into a core-focused day on its own.
- Twice a week is a reasonable starting frequency for most people, since this uses bodyweight resistance rather than heavy external load; add a light plate across your chest as it gets easier.
- Track reps before you track load; once 15 clean, controlled reps feel easy is the natural point to start adding resistance rather than rushing to add weight early.
Safety notes
- Stop the movement at neutral spine; going past it into a deep arch adds strain without adding benefit.
- If you feel sharp or pinching pain rather than muscle fatigue, reduce your range of motion or skip the exercise that day.
Exercise profile
- Force
- Pull
- Mechanics
- Isolation
- Category
- Strength
Frequently asked questions
How many sets and reps should I do for Back Extensions?
3 sets of 10 to 15 reps is a solid starting point. Add resistance, like a weight plate held to your chest, once bodyweight reps stop feeling challenging.
Can I do Back Extensions without a hyperextension bench?
Yes. Hyperextensions With No Hyperextension Bench works the same movement pattern lying face down on the floor, or with a partner holding your ankles.
Why does my lower back feel sore after Back Extensions?
Mild muscle soreness a day or two afterward is normal for a new exercise. Sharp pain during the set itself is different; that means you're rounding your spine or arching too far, and it's worth cutting your range of motion.