Published by PMR of NY & CT
If you live with back pain and carry extra weight, you may have been told that losing a few pounds would help. That advice can feel frustrating when pain makes it hard to walk, exercise or sleep well. There is a real link between weight and back pain, but the research on weight loss and back pain is less clear-cut than "lose weight and the pain goes away."
Body weight is one factor among many, alongside strength, activity, sleep, stress and the condition of your spine. For many people, gradual weight loss paired with regular movement may ease strain on the back. Here's what we know, and how to get moving without making your pain worse.
How extra weight affects your spine
Your lower back carries much of your upper body's weight, and that load rises whenever you bend, lift or climb stairs. More body weight means more work for the discs, joints and muscles of the spine.
Research points to other links between obesity and back pain as well:
- Inflammation: fat tissue releases substances that promote low-grade inflammation throughout the body, which may make tissues more sensitive to pain.
- Disc health: higher body weight has been linked with more wear in the discs of the lower back on imaging.
- Less activity: pain makes movement harder, and moving less weakens the muscles that support the spine.
- Sleep: obesity raises the risk of sleep apnea, and poor sleep can lower your tolerance for pain.
What research says about weight loss and back pain
Studies consistently find that people with overweight or obesity are more likely to have low back pain and sciatica than people at a lower weight. That is an association, though. It doesn't prove that weight alone causes the pain.
So, can losing weight help back pain? It may, but trials that test this directly are few, and their results are mixed. Some people report less pain after losing weight, while others see little change in their back even as other health measures improve.
Staying active and building strength help many people with back pain, and the same habits support weight loss, so they're a sensible place to start.
Back-friendly ways to get moving
When your back hurts, low-impact exercise is usually the easiest place to begin:
- Walking: start with short, flat routes and add a few minutes at a time
- Water exercise: pool walking, swimming or water aerobics, where the water supports part of your weight
- Stationary cycling: a recumbent bike, with its supportive backrest, is often more comfortable for sore backs
- Strength training: exercises for your core, hips and legs, which share the work of supporting your spine
Better core strength won't change the scale much on its own, but it helps your body handle everyday loads. The Physical Activity Guidelines for Americans recommend at least 150 minutes of moderate activity a week, plus muscle strengthening on two or more days. If that feels out of reach, start with what you can manage and build gradually.
Mild muscle soreness that settles within a day or two is common when you start moving more. Sharp pain, or pain that travels down a leg, is a signal to ease off and check in with a clinician.
Building the right care team
Working on weight loss and back pain at the same time is easier when your care team works together. Your primary care physician can review your overall health, medicines and weight-management options, and a registered dietitian can help you build an eating plan you can keep up.
At Physical Medicine & Rehabilitation of NY & CT (PMR), we focus on the back side of that plan. Physical therapy builds a progressive exercise program around your pain, chiropractic care can ease stiff joints, and our physiatry and pain management team evaluates pain that isn’t improving. You can also read how we approach lower back pain.
When back pain needs prompt medical care
Call your doctor soon if you have back pain along with:
- Fever or chills
- Weight loss you aren't trying for
- New numbness, tingling or weakness in a leg
- Pain after a fall or other injury
- Pain that is worse at night or doesn't ease with rest
Get emergency care right away if you can't control your bladder or bowels, feel numb in the groin or inner thighs, or suddenly can't move both legs normally.
Frequently asked questions
Can back pain cause weight gain?
It can contribute. Pain often makes people less active, and the poor sleep that comes with pain can affect appetite and energy. Some medicines used for pain, nerve symptoms or mood list weight gain as a possible side effect. If your weight has changed since your back pain began, mention it to your doctor so they can review your medicines.
How much weight do you need to lose to ease back pain?
There's no set number, and results vary widely. Even a small loss may lighten the load on your spine and make movement easier. The CDC notes that a modest loss, such as 5 percent of your body weight, can help improve blood pressure, cholesterol and blood sugar. Aim for gradual, steady changes and regular activity rather than a single target on the scale.
Can losing weight help a herniated disc?
It may help indirectly. Weight loss won't reverse a herniated disc, but it may ease the strain on your lower back while the disc recovers. Many disc herniations improve over weeks to months with activity, exercise and time. If a disc is causing leg pain, numbness or weakness, a clinician can guide your recovery and tell you when it’s safe to increase exercise.
Get moving with support from PMR
You don't have to sort out weight and back pain on your own. PMR can help you build strength and stay active while you and your doctor work on your health goals. Request an appointment and our team will be in touch to set up a visit at the PMR office closest to you.
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