Lower Back Curl
The lower back curl is a small, controlled movement where you tilt your pelvis to lift your lower back slightly off the floor, using your lower abdominals rather than momentum. It's less a stretch than a way to feel and switch on the deep abdominal contraction that a lot of people never notice during bigger core exercises. Because the range is tiny and the load is only your own bodyweight, it works well as a warm-up or as a way to reconnect with your core before harder ab work.
Why it works
Tilting your pelvis backward, so your lower back flattens and then curls slightly off the floor, is driven by your lower abdominal fibers rather than your hip flexors, which is why this movement stays gentle even though it looks similar to exercises that can strain the neck or hips. Keeping the motion small and slow means your abs have to hold the contraction rather than swing through it, which builds the kind of core control that shows up in bigger lifts later.
Set up
- Lie on your back with your knees bent and feet flat on the floor, hip-width apart.
- Rest your arms by your sides, palms down.
- Let your lower back settle into its natural, slightly arched position before you begin.
How to do it
- Tighten your lower abs to tilt your pelvis backward, flattening your lower back against the floor.
- Continue the tilt until your tailbone curls slightly up off the floor.
- Hold the curled position for a second or two, keeping your hips and shoulders still.
- Release slowly, letting your lower back and tailbone return to the floor.
- Repeat the tilt and release for the set without rushing between reps.
Form cues
- Move from the pelvis, not the legs.
- Keep the lift small and slow.
- Feel it low in your abs, not in your neck.
- Breathe normally through the hold.
Breathing: Exhale as you curl your lower back up, inhale as you release back down.
Common mistakes
Pushing through the feet to force the hips up, turning the curl into a small bridge.
Fix: Keep your feet relaxed on the floor and let the lift come from tightening your lower abs alone.
Rushing through reps so the movement becomes a bounce instead of a controlled curl.
Fix: Slow down and hold the curled position for a beat before releasing, so your abs actually do the holding.
How to program it
- This is gentle enough to do daily, either as part of a warm-up or as a short core activation drill before other ab work.
- Two or three sets of 10 to 15 slow reps is plenty; more reps done fast won't add much once the movement stops feeling controlled.
- It pairs well right before a bigger ab exercise like a reverse crunch, so your lower abs are already switched on.
Safety notes
- Keep the range small; this isn't meant to lift your hips high off the floor, and forcing more height usually just recruits your legs instead of your abs.
- Stop if you feel any strain in your lower back rather than a light contraction in your abdominals.
Exercise profile
- Force
- Static
- Mechanics
- Isolation
- Category
- Stretching
Frequently asked questions
How many reps of the lower back curl should I do?
Two or three sets of 10 to 15 slow, controlled reps is plenty, since this is meant to be a gentle activation drill rather than a max-effort ab exercise.
Can I do this without any equipment?
Yes, it only needs your bodyweight and a floor or mat, which makes it easy to fit in at home or as part of a warm-up anywhere.
Why can't I feel my lower back lifting off the floor?
The lift is meant to be very small, often just a light unweighting of your tailbone rather than a visible rise. Focus on the feeling of your lower abs tightening rather than watching for a big movement.