The exercise you keep doing is the only exercise that counts in axial spondyloarthritis

Movement lowers disease activity and protects the mobility you have, but the gains fade when you stop, which is why the routine you can sustain beats the perfect one you can't.

Week of July 03, 2026 — Angelo Papachristos PT, ACPAC

Daniel is 34, three years into an ankylosing spondylitis diagnosis, and he came to clinic with his phone open to a fitness app. He had finished a six-week physiotherapy program at the hospital, felt looser and less sore than he had in years, then let it slide when work got busy. Within a month the morning stiffness was back. He wanted the honest answer to one question: if the benefit disappears the moment I stop, is it even worth restarting?

The advice most people get is true and nearly useless

Most patients with axial spondyloarthritis (an inflammatory arthritis that mainly affects the spine and the sacroiliac joints, where the base of the spine meets the pelvis) get told some version of "stay active, keep moving, exercise is good for you." None of that is wrong. It also does not tell you what you actually came to find out: what does movement change, what does it only hold in place, and how much do you have to do before the effort pays off.

The part worth saying plainly is that exercise is not a side dish in axSpA. The 2022 ASAS-EULAR management recommendations (Ramiro and colleagues, Annals of the Rheumatic Diseases, 2023) place patient education and regular exercise as the non-drug cornerstone of care, sitting alongside medication rather than underneath it. That is a stronger statement than "good for you," and it is the frame Daniel deserved instead of a shrug.

What movement actually changes

Start with the finding that surprises people. Exercise in axSpA does not only ease symptoms, it can lower disease activity itself. In a Norwegian randomized trial of roughly 100 patients (Sveaas and colleagues, British Journal of Sports Medicine, 2020), three months of high-intensity training, combining cardio and strength work, reduced measured disease activity compared with a group carrying on as usual. That matters because disease activity in this condition is driven partly by inflammation, and the idea that pushing hard in the gym could nudge that downward runs against the old instinct to rest an inflamed joint.

Alongside that, the older evidence base is consistent about function and pain. A Cochrane review of physiotherapy in ankylosing spondylitis (Dagfinrud and colleagues, 2008) found that exercise programs improved physical function and reduced pain compared with no intervention, and that supervised group physiotherapy tended to beat home exercise done alone. So the honest list of what movement improves is real: pain, stiffness, day-to-day function, cardiorespiratory fitness, and the disease activity score your rheumatologist tracks.

The cardiovascular piece deserves its own line, because axSpA carries a higher background risk of heart and vascular disease than the general population, tied to years of systemic inflammation. The Sveaas trial measured cardiovascular risk factors for exactly this reason. When you train, you are not only working on your back.

The catch, and it is the whole point

Here is what nobody told Daniel clearly. Almost every trial showing benefit is a trial of an ongoing program. The people were still exercising when the good numbers were measured. The evidence for lasting benefit after a program ends and adherence drops is much thinner, and what happens in real life is the thing Daniel already lived through. Structured block finishes, the routine loses its scaffolding, the stiffness comes back.

That is not a failure of willpower and it is not a sign the exercise was pointless. It is how conditioning works in any body, with or without arthritis. Strength, flexibility and fitness are held, not banked. The morning he described, stiff again a month after stopping, is the most predictable outcome in this whole field. Which flips his question on its head. The problem was never whether exercise works. It was that a six-week program was always going to end, and nothing was built to replace it.

This is why I push back on the way exercise gets prescribed as a course, like a round of antibiotics you complete and move on from. In axSpA it behaves more like brushing your teeth. The value is in the repetition, and a modest routine you repeat most days will do more for you over a year than an intense program you abandon in six weeks.

What the long game with spinal mobility can and can't do

Spinal stiffness in axSpA comes from two different sources, and keeping them separate changes what you should expect. Some of the tightness is active inflammation and muscle guarding. That part responds to treatment and to movement, and it is where regular mobility work earns its keep, preserving the range you have and often reclaiming some of the range inflammation stole.

The other source is structural. Over years, some people form new bony growth between vertebrae, called syndesmophytes, that can bridge and eventually fuse segments of the spine. Exercise does not reverse fusion. No amount of stretching melts a syndesmophyte. What consistent movement does is protect posture and function around whatever structural change is happening, so that if parts of your spine do stiffen, they stiffen in a usable position rather than a hunched one. Setting that expectation honestly is kinder than implying a good enough routine will keep the spine forever supple. The realistic prize is holding function and posture over decades, and that prize is large.

Flares, fear, and the one safety conversation to have

Two things quietly wreck consistency. The first is flares. The instinct to stop entirely when everything hurts is understandable and usually the wrong move. In most flares the better approach is to reduce load and range, keep something gentle going, and scale back up as the flare settles, rather than dropping to zero and having to rebuild from scratch.

The second is fear of movement itself, which clinicians call kinesiophobia. A 2026 cross-sectional study in Clinical Rheumatology found that people with axSpA who reported more fear of movement were less likely to meet physical activity guidelines. It is a cross-sectional snapshot, so it shows an association rather than proving the direction, but it matches what I see in clinic constantly: the worry that exercise is grinding down an already sore spine is often the thing keeping people still. For the great majority, appropriate movement is protective, not destructive.

There is one genuine exception that deserves a direct conversation. In people whose spine has become significantly fused and rigid, the spine can behave like a long rigid bone and become vulnerable to fracture from what looks like minor trauma, sometimes called a chalk-stick fracture, occasionally with serious consequences (case reports of this appear in the emergency medicine literature). This does not mean a fused spine should not exercise. It means high-impact or collision activities need individualized advice, and it is worth asking about specifically rather than guessing.

What to do, and the conversation to have

Choose the routine you will actually repeat, not the one that looks best on paper. For most people that means a short daily mobility and posture piece, a few sessions a week that get you breathing hard, and some strengthening work, ideally with a physiotherapist setting the starting doses and progression. Keep something going through minor flares by cutting load and range rather than stopping. Then have two specific conversations with your care team: ask your physiotherapist for a maintenance plan you can run at home between any supervised blocks, and if your spine is significantly fused, ask your rheumatologist or physiotherapist directly which activities carry fracture risk for you.

What this does not mean

This is not a reason to ease off the medication that controls your inflammation. Exercise works alongside your drug treatment, not instead of it, and if your disease activity is high, movement helps but does not replace a conversation about your DMARD or biologic. Read this as a case for consistency, not as license to stop anything your rheumatologist has prescribed.

References

Ramiro 2023 - ASAS-EULAR 2022 axSpA management recommendations. Ramiro S, Nikiphorou E, Sepriano A, et al. ASAS-EULAR recommendations for the management of axial spondyloarthritis: 2022 update. Annals of the Rheumatic Diseases. 2023.
https://pubmed.ncbi.nlm.nih.gov/36270658/

Sveaas 2020 - high-intensity exercise reduces disease activity in axSpA. Sveaas SH, Bilberg A, Berg IJ, et al. High intensity exercise for 3 months reduces disease activity in axial spondyloarthritis: a multicentre randomised trial of 100 patients. British Journal of Sports Medicine. 2020;54(5):292-297.
https://pubmed.ncbi.nlm.nih.gov/30745314/

Dagfinrud 2008 - Cochrane physiotherapy for ankylosing spondylitis. Dagfinrud H, Hagen KB, Kvien TK. Physiotherapy interventions for ankylosing spondylitis. Cochrane Database of Systematic Reviews. 2008;(1):CD002822.
https://pubmed.ncbi.nlm.nih.gov/18254008/

Kinesiophobia and physical activity in axSpA - Clinical Rheumatology 2026. Cross-sectional study linking fear of movement (kinesiophobia) to failure to meet physical activity guidelines in axial spondyloarthritis. Clinical Rheumatology, 2026.

Chalk-stick spinal fracture in ankylosing spondylitis - case report 2026. Hemothorax from a thoracic chalk-stick fracture in ankylosing spondylitis. Clinical Practice and Cases in Emergency Medicine, 2026. Illustrates fracture vulnerability of the rigid fused spine after minor trauma.

This article is patient education from RheumAcademy and reflects general information, not individual medical advice. It does not replace assessment by your own rheumatologist, physiotherapist, or care team, who know your disease, your imaging, and your medications. Do not change your exercise or drug treatment based on this piece alone; use it to ask better questions at your next visit.

Angelo Papachristos PT, ACPAC — Advanced Practice Physiotherapist — Co-Founder, RheumAcademy — Co-Founder, Arthros Inc.

Movement and axSpA