If you have ever felt a sharp twinge in your lower back during a set of situps, or woken up the day after an ab workout with stiffness that makes you walk like a question mark, you already know that traditional ab training and a sensitive lower back do not always mix. The good news is that you do not have to choose between training your abs and protecting your back. You just have to choose the right exercises.
This guide explains why certain ab exercises hurt your lower back, which exercises are generally safer, how to build a complete ab program that strengthens your core without aggravating your back, and when you should stop and see a professional.
Important: this is general fitness information, not medical advice. Lower back pain has many causes, and no article can diagnose yours. If you have a history of disc issues, nerve symptoms, or pain that does not improve, talk to a doctor or physical therapist before starting or changing any exercise program.
For a broader look at the muscles involved, our honest answer on whether abs are genetic covers the anatomy you are working with.
Why Certain Ab Exercises Hurt Your Lower Back
To understand which ab exercises are safer and which are not, it helps to understand why some movements cause back pain in the first place. The lower back (the lumbar spine) is built to move in fairly small ranges of motion, mostly through flexion, extension, and rotation. When those movements are loaded heavily or repeated often, the discs, ligaments, and facet joints can get irritated.
Spinal flexion. Flexion is the movement of bending forward, as in a crunch or situp. Each time you flex your spine under load, the discs get compressed on the front side and stretched on the back side. Done occasionally with good form, this is usually fine. Done repeatedly with poor form, or when the back is already sensitive, it can contribute to disc irritation and pain. This is one reason situps and crunches have fallen out of favor in many training programs: they repeatedly load the spine in flexion while delivering little benefit that safer exercises cannot match.
Hip flexor dominance. The hip flexors attach to the lumbar spine and the front of the pelvis. When they contract forcefully, as they do during situps and leg raises, they pull on the lower back. If your abs are not strong enough to counter that pull, your lower back arches, which compresses the lumbar discs. This is why people with weaker abs often feel their lower back working during ab exercises: the hip flexors are pulling the spine into extension.
Rotation under load. Movements like Russian twists and bicycle crunches rotate the lumbar spine. Most spinal rotation is meant to happen higher up, in the thoracic spine, and the lumbar spine is not designed to rotate much under load. Repeated loaded rotation of the lower back is a common source of disc irritation. Our complete guide to Russian twists covers the risks and safer alternatives.
The 6 Safest Ab Exercises for a Sensitive Lower Back
The exercises below are generally well tolerated because they avoid spinal flexion under load, minimize hip flexor involvement, and train the deep core stabilizers that support the spine. Start with these and progress slowly. If any of them causes pain, stop and check your form or regress to an easier variation.
1. Dead Bug
The dead bug is a go-to safe ab exercise. It trains the deep core in a stable lying position, with no spinal flexion and minimal hip flexor involvement. Lie on your back with your arms extended toward the ceiling and your knees bent at 90 degrees, shins parallel to the floor. Press your lower back flat against the floor by engaging your abs. From there, slowly lower your right arm overhead while extending your left leg straight out, hovering just above the floor. Return to the start and repeat on the other side.
The key is keeping your lower back flat throughout. If your lower back arches off the floor, reduce the range of motion until you can hold it flat. Do 3 sets of 10 reps per side. Our beginner ab training guide covers the dead bug in more detail.
2. Bird Dog
The bird dog is a hands-and-knees exercise that trains the deep core stabilizers, the glutes, and the spinal erectors together. It is a common choice in rehabilitation settings for lower back pain. Start on your hands and knees, hands under your shoulders and knees under your hips. Brace your abs and slowly extend your right arm forward while extending your left leg back, keeping your spine neutral. Hold for about 2 seconds, then return and repeat on the opposite side.
The key is keeping your spine neutral and your hips level. If your torso rotates or your hips drop, shorten the movement. Do 3 sets of 10 reps per side.
3. Plank (With Proper Form)
The plank is safe for a sensitive lower back if, and only if, your form is solid. It is an isometric exercise that trains the deep core in a neutral spine position. Set up on your forearms and toes, elbows directly under your shoulders. Squeeze your glutes hard (this tilts the pelvis slightly and protects the lower back), brace your abs, and hold.
The most common mistake is letting the hips sag, which arches the lower back and puts pressure on the lumbar discs. If you feel lower back pain during a plank, your hips are likely sagging. Stop, reset, and shorten the hold. Start with 20 to 30 second holds and build up gradually. Our complete plank form guide covers the cues and progressions in detail.
4. Side Plank
The side plank trains the obliques and the quadratus lumborum, a deep muscle that helps stabilize the spine. It is safe because it is isometric and involves no spinal flexion or rotation. Lie on your side with your forearm on the floor, elbow under your shoulder. Lift your hips so your body forms a straight line from head to feet. Hold for 20 to 30 seconds per side.
The key is keeping your hips up and your body straight. If your hips sag, shorten the hold. See our side plank guide for cues and progressions.
5. Pallof Press
The Pallof press is an anti-rotation exercise, which means your abs are working to prevent movement rather than create it. This builds the deep core stabilizers, especially the transverse abdominis, without spinal flexion or rotation. Attach a band or cable at chest height, stand sideways to the anchor, hold the handle with both hands at your chest, and press it straight out in front of you.
The resistance will try to pull your hands back toward the anchor. Your job is to keep your hands locked in front of your sternum without letting your torso rotate. Hold the extended position for 2 to 3 seconds, then return. Do 3 sets of 10 reps per side.
6. Glute Bridge
The glute bridge is not strictly an ab exercise, but it matters for lower back health. The glutes and abs work together to stabilize the pelvis, and weak glutes are a common contributor to lower back discomfort. Lie on your back with knees bent and feet flat. Squeeze your glutes and lift your hips until your body forms a straight line from knees to shoulders. Hold for about 2 seconds at the top, then lower under control.
The key is initiating from the glutes, not the lower back. If your lower back hurts, you are likely extending from the lumbar spine instead of the hips. Squeeze the glutes harder and reduce the range of motion. Do 3 sets of 15 reps.
What to Avoid With Lower Back Pain
What you leave out matters as much as what you include. These are the movements most likely to cause problems during ab training.
- Situps. Situps load the spine in flexion repeatedly and recruit the hip flexors heavily, which pull on the lumbar spine. Replace them with dead bugs.
- Traditional crunches. Crunches involve less spinal flexion than situps, but they still load the discs in flexion and can irritate a sensitive lower back. Replace them with dead bugs or bird dogs.
- Russian twists. Russian twists rotate the lumbar spine under load, a combination that is hard on the discs. Our complete guide to Russian twists covers safer alternatives like the Pallof press.
- Supermans. Supermans (lying face down and lifting the arms and legs) load the spine in extension, which can compress the facet joints and aggravate lower back pain. Replace them with bird dogs.
- Floor leg raises. Lying leg raises recruit the hip flexors heavily. If your abs cannot hold a posterior pelvic tilt throughout, your lower back will arch. Replace them with dead bugs until your core is stronger.
- Hanging leg raises (initially). Hanging leg raises are a great ab exercise, but they require significant core strength to perform without the lower back arching. Build up with dead bugs and bird dogs first, then progress to hanging knee raises, and only attempt full hanging leg raises once you can keep a posterior pelvic tilt throughout. Our complete hanging leg raises guide covers the progression.
Sample Safe Ab Workout
Here is a complete ab workout that is generally well tolerated by people with a sensitive lower back. Do it 2 to 3 times per week, with at least one rest day between sessions. The whole thing takes about 15 minutes.
- Dead Bug: 3 sets of 10 reps per side. Rest 45 seconds between sets.
- Bird Dog: 3 sets of 10 reps per side. Rest 45 seconds between sets.
- Plank: 3 sets of 30 seconds. Rest 60 seconds between sets. Squeeze the glutes and keep the hips from sagging.
- Side Plank: 2 sets of 20 seconds per side. Rest 45 seconds between sets.
- Pallof Press: 3 sets of 10 reps per side. Rest 45 seconds between sets.
- Glute Bridge: 3 sets of 15 reps. Rest 45 seconds between sets.
This workout trains the rectus abdominis, obliques, transverse abdominis, spinal erectors, and glutes without spinal flexion or rotation under load. Get clearance from a doctor or physical therapist before starting if you have a history of back problems.
When to See a Professional
Not every back issue is a training problem. Some signs are worth taking to a doctor or physical therapist rather than trying to train through them.
See a professional if you experience any of the following:
- Pain that radiates down one or both legs
- Numbness, tingling, or weakness in the legs or feet
- Pain that does not improve after a few days of rest
- Pain that wakes you at night
- Loss of bladder or bowel control (this is an emergency, seek care immediately)
- Pain that started after a fall, accident, or sudden injury
A physical therapist can help you identify which movements are safe for your specific situation and build a program around them. That is the fastest way to train your core with confidence instead of guessing.
How to Progress Once Your Back Feels Better
Once you have built a foundation of deep core strength and your back is feeling better, you can gradually reintroduce more advanced ab exercises. Progress slowly and intentionally.
Start with hanging knee raises, which train the rectus abdominis through a longer range of motion while still letting you control pelvic tilt. Then try cable crunches with light weight, focusing on flexing from the abs rather than the hips. Finally, add weighted exercises like the ab wheel rollout, which requires significant core strength to perform safely.
Listen to your body throughout. If an exercise causes lower back pain, regress to the previous variation. There is no rush. Our ranked list of the 15 best ab exercises shows which movements to prioritize and which to approach with caution.
How Lower Back Health Fits Into the Bigger Abs Picture
Lower back health is a prerequisite for sustainable ab training. If your back hurts, you cannot train your abs hard enough to build muscle, and you cannot stick with a program long enough to see results. Fixing your back is not a detour from your abs goal. It is the path to it.
The bigger picture is that visible abs require getting your body fat into a range where the muscle actually shows, roughly 10 to 14 percent for men and 18 to 22 percent for women, paired with progressive overload ab training. For the diet side, our complete six pack diet guide covers the macro math. For the body fat targets, our body fat percentage chart for abs shows what to aim for.
If you are wondering how long the whole process takes, our honest answer on how long it takes to get abs walks through the math for your starting point. For home training, our 3-program home ab workout guide includes modifications for trainees with back issues. For those just starting, our complete starter guide covers the setup.
Frequently Asked Questions
Can I train abs with lower back pain?
Yes, if you choose the right exercises and your pain is not severe or getting worse. Avoid spinal flexion movements like situps and crunches. Choose anti-extension exercises like dead bugs, bird dogs, and plank variations that strengthen the core without bending the spine. Stop immediately if any exercise causes pain.
What ab exercises are bad for lower back pain?
Avoid situps, traditional crunches, Russian twists, supermans, and any exercise that involves spinal flexion or rotation under load. These movements increase disc loading and can worsen lower back pain. Replace them with dead bugs, bird dogs, planks, and Pallof presses.
Are planks safe for lower back pain?
Planks are generally well tolerated because they are isometric and involve no spinal flexion. The catch is form: you must keep a neutral spine and not let the lower back sag. If your lower back hurts during a plank, your hips are likely dropping. Start with shorter holds and focus on squeezing the glutes.
Why does my lower back hurt during ab exercises?
Lower back pain during ab exercises usually means your abs are not strong enough to hold the position, so the hip flexors and lower back take over. The fix is to choose exercises that minimize hip flexor involvement, brace harder, and regress to easier variations until your core is stronger.
Will strengthening my abs help lower back pain?
For many people, a stronger core feels more stable and reduces day to day strain on the lower back. But this is not a guaranteed treatment for everyone, and the right exercises matter. If your pain is persistent or severe, talk to a physical therapist or doctor rather than relying on ab training alone to fix it.
Should I do ab exercises if my back hurts today?
If your back is in acute pain, rest and gentle movement like walking are usually better than ab training. Once the acute pain settles, resume with the safe exercises in this guide. If the pain persists for more than a few days or gets worse, see a physical therapist.