In short
In ankylosing spondylitis, exercise is treatment rather than lifestyle advice. Medicines control inflammation; what decides how much movement your spine keeps is a daily routine of extension, rotation and chest expansion, done consistently over years.
Most conditions improve with exercise in the general sense that most people benefit from being active. Ankylosing spondylitis is different. Here, exercise changes the outcome of the disease itself, and stopping it has consequences that medicines do not fully undo.
The reason is mechanical. Inflammation at the points where ligaments attach to bone heals by laying down new bone. Over years, that new bone can bridge between vertebrae and the spine becomes progressively less mobile. The posture the spine sets into is largely the posture it is habitually held in.
Put plainly: a spine that spends years stooping forward can fuse stooping forward. One that is stretched into extension daily has a far better chance of fusing — if it fuses at all — in a usable position.
What the routine has to contain
Four things. Most published programmes are long; these four do most of the work.
Extension. The direction the disease takes away first, and the one nobody uses in daily life.
- Prone lying. Lie face down on a firm surface, propped on elbows, for several minutes. Build up gradually. Unglamorous and probably the single most valuable item here.
- Cobra stretch. From face down, push gently up on the hands, lifting the chest, hips staying down. Hold, repeat.
- Standing back bend. Hands on the lower back, lean back gently, repeat through the day — particularly useful during long periods of desk work.
Rotation and side bending. Lost quietly, and missed badly when it goes — reversing a car, or looking over a shoulder.
- Seated rotation. Sitting, arms crossed over the chest, turn to each side.
- Side bending. Standing, slide one hand down the outside of the thigh.
Chest expansion. The joints between ribs and spine are involved, and chest movement reduces over time. This affects breathing capacity and is easy to ignore until it is advanced.
- Deep breathing, hands on the lower ribs, feeling them move outwards — ten breaths, several times daily.
- Arm raises with inhalation, lifting both arms overhead as you breathe in.
Posture awareness. Checking against a wall: heels, buttocks, shoulder blades and the back of the head all touching. The gap between the back of the head and the wall is a simple measure, and worth recording every few months. Growing is a signal to intensify treatment and physiotherapy — not simply to try harder at standing up straight.
How often, and how much
Daily. Thirty minutes is ideal, fifteen is worthwhile, and five is enormously better than none on a bad day.
Consistency beats intensity in this condition. A person who does fifteen minutes every morning for ten years will do better than one who does an hour twice a week for a year and then stops.
Mornings are usually best because stiffness is worst then, and the routine doubles as the thing that gets the day started. A hot shower first makes the first few minutes considerably easier.
The other half: aerobic exercise
Swimming is the most often recommended, with reason — it provides extension, rotation and chest expansion at once, with no impact. Backstroke is particularly good for extension; prolonged breaststroke with the head held up is less so for the neck.
Walking, cycling with the handlebars set high enough to avoid a stooped position, and cross-trainers all work. Running is not forbidden but is less comfortable for many.
There is a second reason this matters. Cardiovascular risk is higher in inflammatory arthritis than in the general population, and aerobic exercise addresses that directly.
What to be careful with
- Contact sports and anything with a fall risk, once there is significant fusion. A fused spine behaves like a long bone, and fractures from relatively minor trauma are a genuine risk. This is the most important caution in the list.
- Heavy loaded flexion — deadlifts, loaded sit-ups, heavy forward-bending work — particularly with established disease or low bone density.
- Forceful spinal manipulation. Not appropriate in a fused or fusing spine.
- Prolonged stooping at a low desk or over a phone, which trains exactly the posture to be avoided.
- High-impact activity during a flare, when gentler movement is more sensible.
If a movement causes sharp pain, stop. If a new pain appears after a fall, treat it as a possible fracture and get it imaged — this is not a wait-and-see situation with a fused spine.
Sleeping, sitting and working
- A firm mattress and one thin pillow. A thick pillow encourages the neck forward, which is the direction to resist.
- Sleeping flat on the back when possible; sleeping curled up for years works against you.
- A chair with real back support, and getting up every thirty to forty minutes. Stillness is what produces stiffness.
- Screen at eye level. The same advice as for cervical spondylosis, for different reasons.
Exercise does not replace treatment
This needs saying plainly. Exercise preserves movement and function; it does not control inflammation. If you have inflammatory back pain that wakes you in the second half of the night, morning stiffness over thirty minutes, and raised markers, the inflammation needs treating in its own right — and modern treatment, including biologics where indicated, has changed what this disease does to people.
The two work together. Treatment reduces the inflammation that drives new bone formation; exercise determines the position and range the spine keeps. Neither substitutes for the other. Inflammatory back pain and how it differs from mechanical back pain is the place to start if you have not yet had a diagnosis, and what a positive HLA-B27 means covers the test people most often arrive with.
Getting through a flare without losing ground
Flares happen, and the instinct to stop everything is what costs people movement they do not get back.
During a flare: reduce the load, not the frequency. Keep doing the movements, gently, within a smaller range. A shortened routine done daily through a bad fortnight preserves far more than a fortnight of rest followed by starting again.
Heat helps before movement. Swimming is often the easiest thing to tolerate when weight-bearing exercise is painful. Anti-inflammatory tablets, if you take them, are more useful taken regularly for a short period during a flare than occasionally.
What a flare should also prompt is a review. Repeated flares on current treatment are information, not bad luck — they are the usual trigger for stepping treatment up.
The things that are easy to forget
Beyond the spine itself, this condition asks for attention in a few places that are regularly overlooked.
- Eyes. Acute anterior uveitis — a painful, red, light-sensitive eye with blurred vision — occurs in a substantial minority and needs same-day ophthalmology, not a wait. Know the symptoms before it happens.
- Bone density. Osteoporosis is commoner in ankylosing spondylitis than in the general population, including in younger men, and fractures through a fused spine are serious.
- Cardiovascular risk, raised by chronic inflammation; blood pressure, lipids and smoking deserve the same attention as the spine.
- Bowel symptoms. Persistent diarrhoea or blood should be mentioned, since inflammatory bowel disease is associated — see enteropathic arthritis.
- Skin and nails. Psoriasis changes the treatment options.
Getting started
Ask for a physiotherapist who has treated axial spondyloarthritis before — the programme is specific, and a general back-pain programme built around flexion is the wrong shape. Learn the movements properly once, then do them at home.
If you have the diagnosis and have never been given a routine, or your wall measurement has been creeping up, that is worth an appointment.
Common questions
What exercises should I avoid with ankylosing spondylitis?
Contact sports and activities with a fall risk once there is significant fusion, because a fused spine fractures more easily. Also heavy loaded forward bending, forceful spinal manipulation, and prolonged stooping over a low desk or phone, which trains the posture the disease is already pulling you into.
How often should I exercise with ankylosing spondylitis?
Daily. Thirty minutes is ideal, fifteen is worthwhile, five is far better than none. Consistency over years matters more than intensity in any single session, and mornings generally work best because stiffness is worst then.
Is swimming good for ankylosing spondylitis?
It is among the best options, because it provides extension, rotation and chest expansion together with no impact. Backstroke is especially useful for extension. Prolonged breaststroke with the head held above water is less kind to the neck.
Can exercise stop ankylosing spondylitis getting worse?
Exercise preserves movement, posture and function, and influences the position a spine sets into. It does not control the underlying inflammation, which needs medical treatment. The two do different jobs and neither replaces the other.
Why does my back feel better after exercise but worse after rest?
That is the hallmark of inflammatory back pain. Inflammation stiffens a joint that is held still, and movement disperses it. Pain that improves with activity and worsens with rest — and that wakes you in the second half of the night — is the pattern that distinguishes it from mechanical back pain.
What is the wall test?
Stand with heels, buttocks, shoulder blades and the back of the head against a wall. If the head cannot touch without straining, measure the gap. Recording that distance every few months is a simple way to track posture, and an increasing gap is a reason to review treatment as well as exercise.
Sources
- NHS — ankylosing spondylitis www.nhs.uk
- NIAMS — ankylosing spondylitis www.niams.nih.gov
- NICE NG65 — spondyloarthritis www.nice.org.uk
- NHS — treating ankylosing spondylitis www.nhs.uk
This article is general information and does not replace a consultation.