Key points
- Fibromyalgia is real, and so is the weight link. About 1 in 3 people with fibromyalgia also lives with obesity, and extra weight tends to go with more pain, tiredness and broken sleep.
- Losing weight can ease symptoms. In a six-month trial, people with obesity who lost weight through diet had less pain in the lower body, slept better and felt less low.
- Movement is the best-supported treatment. European rheumatology experts gave exercise their only strong recommendation. Gentle walking, water exercise and tai chi all have trial evidence.
- Pace it, never push through a flare. Start well below what you think you can do, spread activity over the day and keep a lighter version for bad days.
- No special diet is needed. A small calorie deficit with protein, vegetables and fibre does the weight-loss work, with easy meals ready for flare days.
- Talk to your doctor first. Other causes of pain and tiredness need checking, and your doctor decides on your medicines.
Fibromyalgia and weight loss: the short answer
Yes, losing some weight can help fibromyalgia, and gentle, well-paced movement is the most reliable way to ease symptoms. Neither has to be fast or hard to make a difference.
Fibromyalgia is a long-term condition with widespread pain, poor-quality sleep, physical exhaustion and problems with memory and concentration. Between 2 and 4 % of people have these symptoms, according to an expert review in Nature Reviews Disease Primers. If you have been told it is “all in your head”, please know that the pain you feel is real.
A large review of 41 studies found that 35.7 % of people with fibromyalgia live with obesity. In most studies, a higher weight went with more pain, tender points, stiffness and fatigue, and poorer sleep and daily function.
These links were mostly weak, and the authors judged the risk of bias as high, so they are a signal rather than proof.
Trials of weight loss in fibromyalgia are few, but the ones that exist point the same way: symptoms got better as weight came down. The plan on this page puts walking and food together, step by step, at a pace your body can accept.
Why extra weight and fibromyalgia feed each other
Extra weight and fibromyalgia seem to make each other worse: pain makes moving harder, moving less adds weight, and more weight brings more pain and poorer sleep. Knowing this circle helps you choose where to break it.
In Norway, researchers followed 15,990 women without fibromyalgia for 11 years. Women with overweight or obesity at the start had a 60–70 % higher risk of developing it than women in the healthy weight range. For women who were heavier and also inactive, the risk was more than double.
This was an observational study, so it cannot prove that weight causes fibromyalgia. It does suggest that being active and heavier is better than being inactive and heavier, which is useful news if you are just starting.
A study of 215 people with fibromyalgia looked closer. Almost half lived with obesity and another 30 % with overweight. Those with obesity felt more pain when tender spots in the lower body were pressed, had weaker legs and less flexibility, and slept for shorter, more restless nights.
| Link in the circle | What happens | What helps |
|---|---|---|
| Pain and fatigue | You move less to avoid a flare | Very short, regular walks well below your limit |
| Moving less | Muscles weaken and you burn less energy | Gentle strength moves at low load, twice a week |
| Weight gain | More load on legs, hips and back | A small, steady calorie deficit you can keep |
| Poor sleep | More hunger and a lower pain threshold | A regular bedtime and daylight activity |
| Low mood and stress | Comfort eating and less drive to move | Support, company on walks and kind self-talk |
You do not need to fix every link at once. A small change at one point, such as a five-minute walk after lunch, often makes the next link a little easier.
Why many people gain weight after fibromyalgia starts
Weight gain after fibromyalgia begins is common and has clear reasons: you can do less, you sleep worse, your mood may drop and some treatments affect appetite. It is not a sign of weak willpower.
- Less movement. When every walk hurts or wipes you out for a day, it makes sense to do less. Over months, that lowers the energy you use and the strength in your legs.
- Poor sleep. Unrefreshing sleep is part of the condition. Tired people tend to feel hungrier and reach for quick energy from sugary or fatty food.
- Low mood and stress. Living with daily pain is hard. Food can become comfort, and cooking can feel like too much on a bad day.
- Medicines. Some medicines used for pain, nerve pain, sleep or mood can increase appetite or weight. Our page on medicines that can cause weight gain explains this; never stop or change a medicine yourself, and ask your doctor if you are worried.
Many people with fibromyalgia also meet doubt or judgement about their pain and their weight. That double stigma can make it harder to ask for help. Our page on weight stigma explains why weight is never simply a matter of choice.
Does losing weight help fibromyalgia? What the trials show
The best trial so far says yes: people with fibromyalgia and obesity who lost weight had fewer symptoms than those who did not. The evidence is still small, so expect help with symptoms, not a cure.
In a randomised trial, 83 people with fibromyalgia and obesity were split into two groups. One group followed a dietary weight-loss programme for six months, the other did not try to lose weight.
The weight-loss group scored better on the Fibromyalgia Impact Questionnaire, a standard measure of how much the condition affects daily life. They had fewer tender points, less pain in the lower body, less depression and better sleep. Two blood markers of inflammation, IL-6 and CRP, were also lower.
An earlier pilot study offered 20 weeks of behavioural weight-loss support to women with fibromyalgia and overweight or obesity. On average they lost about 4 kg (9 lb), or 4.4 % of their starting weight. The more weight a woman lost, the more her fibromyalgia impact and pain interference fell.
| Study | Who | What was looked at | Main result | Design |
|---|---|---|---|---|
| D’Onghia and colleagues | 41 studies | Obesity in fibromyalgia | 35.7 % lived with obesity; weight linked to worse symptoms | Meta-analysis, high risk of bias |
| Mork and colleagues | 15,990 Norwegian women, 11 years | Weight and later fibromyalgia | 60–70 % higher risk with BMI 25 or more | Cohort (observational) |
| Okifuji and colleagues | 215 people with fibromyalgia | Weight, pain, strength, sleep | Obesity went with more pain, weaker legs, poorer sleep | Cross-sectional |
| Senna and colleagues | 83 people with obesity | Six months of dietary weight loss vs none | Better daily function, sleep and mood; fewer tender points | Randomised trial |
| Shapiro and colleagues | Women with overweight or obesity | 20 weeks of weight-loss support | 4.4 % lost; more loss, less impact and pain | Pilot, no control group |
A modest loss is a realistic first goal. You do not need to reach a “perfect” weight before you feel some benefit.
Exercise: the best-supported treatment for fibromyalgia
Regular, gentle exercise is the treatment with the strongest support in fibromyalgia. In the European (EULAR) recommendations, exercise was the only therapy to receive a “strong for” rating; other treatments received weaker ratings.
Those experts suggest starting with clear information about the condition and treatments that do not involve medicines, adding other help only when needed. A Cochrane review of aerobic training, such as walking or cycling, gives an idea of what to expect.
The review pooled 13 trials with 839 people. Compared with not exercising, aerobic training lowered pain by about 11 points and improved physical function by about 10 points, both on 0–100 scales. Quality of life rose by about 8 points.
The authors rated most of this evidence as low quality and the gains as modest. Tiredness and stiffness changed little, and it is less clear how long the benefits last once people stop.
About as many people dropped out of the exercise groups as the comparison groups, but most trials did not record side effects well. That is one more reason to start lower than you think and to build up slowly.
If you have ME/CFS (myalgic encephalomyelitis/chronic fatigue syndrome) rather than fibromyalgia, the advice on exercise is different: follow your own care team and do not use the plan on this page.
Walking without a flare: pace it and spread it out
Walking helps fibromyalgia most when you keep each bout short, spread it over the day and stop while you still feel you could do more. You are aiming for steady days, not heroic ones.
In one trial, 84 adults with fibromyalgia who were hardly active worked towards 30 minutes a day of everyday activity, built from short bouts they chose themselves. After 12 weeks they took 54 % more steps, reported less pain and found daily tasks easier than a group that received only education.
Two details matter for weight loss. Their body weight ended up no different from that of the education group, which shows why food has to do much of the work. And at follow-up 6 and 12 months later, the gains had faded once the support stopped.
So the trick is to make walking part of daily life and keep someone on your side. A walking partner, a set time each day or a simple log can help you carry on after the first good weeks.
How to pace your walking
- Find your baseline. Note how long you can walk on an average day without paying for it tomorrow. Start at about half of that.
- Split it up. Three walks of five minutes are usually kinder than one of fifteen.
- Grow slowly. Add a minute or two to one walk per week, only if the past week went well.
- Use the next-day check. If pain or fatigue is clearly worse the next day, go back to the last level that felt fine.
- Keep a flare-day version. On a bad day, a few minutes indoors or gentle seated moves keep the habit alive without making things worse.
Our walking guide covers shoes, routes and a beginner plan. If even a few minutes is hard, exercise snacks of one to two minutes count too, and low impact cardio shows seated moves for days you cannot go out.
Water exercise, tai chi and other gentle options
Water exercise and tai chi are two of the best-studied gentle options for fibromyalgia, and both can sit alongside walking. Choose what you enjoy and can reach easily, because that is what you will keep doing.
A Cochrane review of 16 trials with 881 people, nearly all women, looked at supervised group exercise in a pool. Compared with no exercise, water training improved pain by about 7 points, stiffness by about 18 points and overall function by about 6 points on 0–100 scales. Strength and walking distance improved too.
When water exercise was compared with similar exercise on land, results were mostly alike, except that land training built a little more grip strength. No serious side effects were reported. Our page on swimming for weight loss explains how to start in a pool, even if you cannot swim.
Tai chi did well in a trial in the United States with 226 adults with fibromyalgia. Every group improved, but after 24 weeks the tai chi groups improved by 5.5 points more on the revised fibromyalgia questionnaire than the aerobic training group. Twice-weekly tai chi for 24 weeks beat the same amount of aerobic training by 16.2 points.
Longer courses of tai chi brought bigger gains than shorter ones. If slow, flowing movement appeals to you, tai chi walking is an easy way to begin, and yoga and pilates are other calm options many people like.
Muscles that are a little stronger make daily life easier. Start strength training with very light moves, few repeats and lots of rest.
| Activity | Joint load | Effort | Evidence in fibromyalgia | First step |
|---|---|---|---|---|
| Walking | Moderate | Easy to moderate | Aerobic review and lifestyle activity trial | 3 × 5 minutes a day |
| Water exercise | Low | Easy to moderate | Cochrane review, 16 trials | One warm-pool class a week |
| Tai chi | Low | Easy | Trial of 226 adults | 10 minutes of slow steps |
| Chair cardio | Very low | Easy | General advice, no fibromyalgia trial cited here | 5 minutes of seated marching |
| Cycling (stationary) | Low | Easy to moderate | Counts as aerobic training | 5 minutes, no resistance |
Food for weight loss with fibromyalgia: no diet is proven to treat it
There is no fibromyalgia diet that has been shown to treat the condition, so you do not need a special or strict plan. What helps you lose weight is the same for everyone: eating a little less energy than you use, with filling food at each meal.
In the weight-loss trial above, the benefits came with weight loss through diet, not from one magic food. That is good news, because ordinary meals you like can do the job.
- Protein at each meal. Eggs, yogurt, beans, lentils, fish or chicken keep you full and help protect muscle. One or two of these at every meal is enough.
- Vegetables and fibre. Half a plate of vegetables, with whole grains and fruit, fills you up for fewer calories.
- Drinks without sugar. Water, tea and coffee without sugar save calories without effort.
- A small deficit. Cutting too hard leaves you even more tired. A gentle, steady loss is easier to keep up.
Food for flare days and low-energy days
On bad days, cooking can feel impossible, and that is when takeaways and snacking creep in. Plan for those days while you feel well.
- Cook once, eat twice: make a double pan of soup, chilli or stew and freeze portions.
- Keep no-cook meals in the house: tinned beans or fish, wholegrain bread, yogurt, fruit and ready-washed salad.
- Sit down to chop, use frozen vegetables and keep a light pan within easy reach.
- Ask a family member to cook one meal a week, or batch-cook together.
Many people ask whether eating to calm inflammation helps. Our page on the anti-inflammatory diet for weight loss looks at that honestly. For a full week of meals, see our free eating plan.
Sleep, fatigue and hunger
Poor sleep and fibromyalgia go hand in hand, and short nights also make hunger stronger the next day. Better sleep helps both your pain and your weight-loss plan.
Simple habits help many people: a regular time to get up, daylight and gentle activity during the day, and a calm hour before bed. Our page on sleep, stress and weight explains how they affect appetite.
If you snore loudly, stop breathing for moments in your sleep or feel very sleepy in the day, ask your doctor about sleep apnoea. Our page on sleep apnea and weight loss explains how it is checked.
Living with pain can wear down your mood. Talking therapies can help you cope with pain, stress and eating, and our page on psychological support describes the options.
Talk to your doctor first: other causes and your medicines
Talk to your doctor first before you change how you eat or move, and ask whether anything else could explain your symptoms. Aches and exhaustion are not always fibromyalgia, and some causes are easy to treat.
- Thyroid. An underactive thyroid can cause tiredness, aching muscles and weight gain. Our page on hypothyroidism and weight loss explains when a blood test makes sense.
- Iron. Low iron can leave you drained and breathless on walks. See anemia and weight loss.
- Your medicines. Bring a list of everything you take. Your doctor decides on any change; never stop or adjust a medicine on your own.
Our doctor visit checklist helps you prepare questions, such as which activity level is safe for you to start at.
See a doctor promptly if you notice new weakness or numbness, fever together with swollen, hot or red joints, or weight loss you cannot explain. If you have thoughts of harming yourself or feel you cannot cope, contact your local emergency number or a crisis line straight away.
A 12-week plan: pace up walking and food together
Talk to your doctor first before you start this plan. It is general guidance, not a personal programme, and every week can be repeated as often as you need.
In weeks 1 and 2, do about half of what you think you can manage. Move on only when a week has gone well, without a clear rise in pain or fatigue the next day.
| Week | Walking per day | Gentle extra | Food step | Flare-day version |
|---|---|---|---|---|
| 1–2 | 2–3 short walks of 3–5 minutes | Seated marching, 5 minutes | Swap sugary drinks for water | Indoor walk of 2 minutes |
| 3–4 | 2–3 walks of 5–7 minutes | Slow tai chi steps, 10 minutes | Protein at breakfast | Seated moves only |
| 5–6 | 2–3 walks of 7–10 minutes | One water exercise session a week | Half a plate of vegetables at dinner | A short slow walk |
| 7–8 | 2 walks of 10–12 minutes | Light strength moves, twice a week | Freeze two batch meals a week | Gentle stretches |
| 9–10 | 2 walks of 12–15 minutes | Water or tai chi, twice a week | Smaller portions of rice, pasta and bread | Half the usual walks |
| 11–12 | 2–3 walks, up to 30 minutes in total | Mix the options you enjoy | Plan snacks ahead | Rest, then restart at week 9 |
Write down your walks, your pain and your sleep each day. After a few weeks, patterns often show which days and amounts suit you best.
A flare does not mean you failed. Rest, drop back a level, and pick the plan up again when you feel ready.
Free help to lose weight with good food and walking
We help people lose weight and get healthier with good food, suitable exercise and walking, including people who live with fibromyalgia. Everything we offer is free.
- A free eating plan: simple, filling meals with easy options for low-energy days. Request your free eating plan.
- Free workout videos: 150 videos in three levels; the gentle Start level includes seated sessions. Get the free workout videos.
- A free video meeting (in English): talk with a volunteer about pacing your plan and what to ask your doctor. Book a free video meeting.
- The free Obesity Foundation Club: your own account to log walks, pain and progress, and ask for help. Join the Club.
Our volunteers are not doctors. Your diagnosis, tests and medicines belong with your own doctor.
Fibromyalgia can make every step feel harder, but small, regular steps still add up. Gentle walking, good food and patience with yourself are a strong place to start.
Frequently asked questions
Will losing weight reduce my fibromyalgia pain?
It may. In a randomised trial of people with fibromyalgia and obesity, those who lost weight over six months had fewer tender points and less lower-body pain than those who did not. Results differ from person to person, so see weight loss as one helpful part of your care, alongside gentle movement.
Why have I gained weight since my fibromyalgia started?
Usually because pain and exhaustion mean you move less, poor sleep makes you hungrier, and low mood can turn food into comfort. Some medicines can also affect appetite. None of this is your fault; ask your doctor to look at the possible causes with you.
Is walking good for fibromyalgia, or will it cause a flare?
Walking is one of the most helpful things you can do, as long as you pace it. Start with a few minutes at a time, well below your limit, and only add more after a good week. Walks that are too long or too fast are what tend to trigger a flare.
Is there a fibromyalgia diet for weight loss?
No diet has been proven to treat fibromyalgia. For weight loss, ordinary filling meals work: protein, vegetables, fibre and fewer sugary drinks, slightly below what your body uses. Plan easy meals for days when cooking is too much.
How much exercise should I do with fibromyalgia?
Begin with an amount that leaves you feeling no worse the next day, even if that is only five minutes. In one trial, people slowly worked up to 30 minutes of everyday activity a day in short bouts. Your doctor or a physiotherapist can help you set a safe starting level.
Can fibromyalgia make you lose weight?
Fibromyalgia is not known to cause weight loss; weight gain is more common. If you are losing weight without trying, see your doctor, because it can point to another condition that needs checking.
Sources
- Häuser W et al. – Fibromyalgia. Nature Reviews Disease Primers (2015)
- D’Onghia M et al. – Fibromyalgia and obesity: a comprehensive systematic review and meta-analysis. Seminars in Arthritis and Rheumatism (2021)
- Mork PJ, Vasseljen O, Nilsen TI – Association between physical exercise, body mass index, and risk of fibromyalgia: longitudinal data from the Norwegian Nord-Trøndelag Health Study. Arthritis Care & Research (2010)
- Okifuji A et al. – Relationship between fibromyalgia and obesity in pain, function, mood, and sleep. The Journal of Pain (2010)
- Senna MK et al. – Effect of weight reduction on the quality of life in obese patients with fibromyalgia syndrome: a randomized controlled trial. Clinical Rheumatology (2012)
- Shapiro JR, Anderson DA, Danoff-Burg S – A pilot study of the effects of behavioral weight loss treatment on fibromyalgia symptoms. Journal of Psychosomatic Research (2005)
- Macfarlane GJ et al. – EULAR revised recommendations for the management of fibromyalgia. Annals of the Rheumatic Diseases (2017)
- Bidonde J et al. – Aerobic exercise training for adults with fibromyalgia. Cochrane Database of Systematic Reviews (2017)
- Bidonde J et al. – Aquatic exercise training for fibromyalgia. Cochrane Database of Systematic Reviews (2014)
- Fontaine KR, Conn L, Clauw DJ – Effects of lifestyle physical activity on perceived symptoms and physical function in adults with fibromyalgia: results of a randomized trial. Arthritis Research & Therapy (2010)
- Fontaine KR, Conn L, Clauw DJ – Effects of lifestyle physical activity in adults with fibromyalgia: results at follow-up. Journal of Clinical Rheumatology (2011)
- Wang C et al. – Effect of tai chi versus aerobic exercise for fibromyalgia: comparative effectiveness randomized controlled trial. BMJ (2018)
