Possible is not the same as good for you

There’s a rule most of us absorbed without ever agreeing to it. If it’s hard, it’s working. If it hurts a bit, that’s the price. Push through.

It shows up in gym slogans, obviously. But it leaks much further than that — into the walk you didn’t want to take, the social evening you were dreading, the morning routine you’ve read somewhere you ought to have. The effort becomes the point. Whether it left you better or worse becomes a detail.

A study published this week put that rule under a proper test, in a group of people for whom getting it wrong has real consequences.

What they did

Researchers at Timone Hospital’s Pain Assessment and Treatment Centre in Marseille ran a randomised trial with 79 adults living with moderate to severe fibromyalgia — a long-term condition involving widespread pain, fatigue, poor sleep, and a nervous system that reacts strongly to ordinary physical sensation.

Thirty-nine took part in a supervised, adapted physical activity programme alongside their usual care. Forty received usual care alone. Everyone was followed for twelve months.

The programme itself ran for six of those months: three two-hour sessions a week, a mix of pool and land-based movement, kept deliberately at very low intensity and broken into small bursts calibrated to each person’s own tolerance. Not a scaled-down version of a normal workout. A different shape entirely.

Two design choices stand out. The first is that the activities were matched to what people actually liked doing. As lead author Stéphanie Ranque-Garnier put it: “Motivation cannot come from cycling like a laboratory rat, especially if you do not like cycling!”

The second is the measurement. Alongside questionnaires, pedometers, fitness tests and PET brain scans for a subset of 33 participants, the team leaned on something much smaller. “Our simplest tool for knowing whether a session was appropriate was the patient’s own evaluation before and after the session,” Ranque-Garnier said. “The session should leave the patient at least as well as, and ideally better than, before — in terms of pain, mood, fatigue, and concentration.”

Before, and after. Four things. That was the instrument.

What they found

At six months, the exercise group scored 14.5 percent better on a standard fibromyalgia impact questionnaire than the usual-care group. They reported less average pain, better sleep and greater flexibility, and relief immediately after individual sessions. By three months they had added an average of 1,619 steps a day to a baseline of around 4,185 — while the comparison group’s daily step count slightly fell.

Here’s the part that unsettles the old rule. None of this came with an improvement in maximum aerobic capacity. Fitness, in the sense the word usually carries, didn’t move. Quality of life did.

The brain scans showed increased metabolism in the right cerebellum among the exercise group, correlated with their increased step counts — the cerebellum being a region involved in coordinating movement, and also in how pain and emotion are regulated. The researchers are careful to call this a mechanistic clue rather than proof of anything.

And something happened in the comparison group that is worth sitting with. Some of them became more active on their own, got worse, and gave up. “We think that some had been motivated by the title of the study and applied the familiar ‘no pain, no gain’ principle,” Ranque-Garnier said. Which led to the sentence we keep returning to: “In fibromyalgia, an activity that is physically possible is not necessarily an activity that is therapeutically appropriate.”

The limitations are stated openly, and they are real. Everyone was recruited from a specialist pain centre and had already completed therapeutic education workshops, so they may have been readier than most to take something new on. The brain imaging covers a small subset. It was a single centre. And the programme was closely supervised throughout by professionals trained to adapt movement for chronic pain — Ranque-Garnier is explicit that the findings do not mean any form of exercise will help, and certainly do not mean anyone should push through pain.

What we keep thinking about

The honest caveat first, because it matters. This is research into a specific health condition and a closely supervised clinical programme. It is not a set of instructions for anyone, and nothing in it should be read as guidance about managing pain or illness. Those are conversations for a doctor.

But the question the team used isn’t clinical at all.

Did that leave me at least as well as it found me?

Almost nobody asks it. We ask whether we did the thing. Whether we hit the number, kept the streak, showed up again. Those are questions about compliance. Ranque-Garnier’s question is about direction of travel, and it can only be answered from the inside — which is precisely why it tends to get skipped in favour of something a device can count for us.

There’s a quieter thing underneath it, too. Ranque-Garnier described arriving at the pain centre in 2015 and repeatedly hearing that fibromyalgia was “not a real disease”, because it was not dangerous in terms of survival. Suffering that doesn’t register on the standard instruments gets quietly treated as suffering that isn’t happening. That pattern is not confined to one condition, and most people reading this will recognise some version of it.

Which is roughly where a small design decision of ours sits. Nagi’s check-in is four taps — mood, sleep, energy — just noted, as the days go by. It doesn’t score you, rank you, or tell you what any of it means; it isn’t a clinician and it doesn’t diagnose anything. It holds the record privately: no name, no email, an anonymous ID rather than a name. Part of the reason we built it that way is that the view from inside is data too, and it’s usually the first thing discarded.

The bit we’d underline

You’re allowed to notice that something left you worse, and to stop doing it, without first having earned the right through sufficient effort.

More is not better. Better is better.

If you want a private place to start noticing your own patterns, Nagi is on Google Play and the App Store — or in your browser at app.nagiandme.app. The first 15 messages are free. No name, no email. Just you, checking in.

— The Nagi team

---

Source: For fibromyalgia, gentle and enjoyable exercise seems to works better than pushing through pain, PsyPost, 2 September 2026, by Eric W. Dolan. Underlying study: Ranque, S., Laurin, J., Linguraru, M. G., Jiang, Z., Loundou, A., Boyer, L., Guieu, R., Boucraut, J., Sault, C., Simon, J., Barthelemy, F., Donnet, A., & Guedj, E., “Efficacy and mechanism of supervised adapted physical activity on quality of life for patients with fibromyalgia: single-center, prospective, randomised clinical and neuroimaging study”, Scientific Reports. Design: single-centre randomised controlled trial, 79 adults with moderate to severe fibromyalgia (39 supervised adapted physical activity plus standard care; 40 standard care only), followed for 12 months, with a six-month intervention of three two-hour low-intensity sessions per week; PET neuroimaging in a subset of 33. Stated limitations: participants were recruited from a specialist pain centre and had already completed therapeutic education workshops, so may have been unusually motivated; the imaging subset is small and the authors describe the cerebellar findings as mechanistic clues rather than proof of causality; spontaneous activity in the control group could not be fully controlled and wearing a pedometer may itself have influenced behaviour; the intervention was closely supervised by professionals trained to adapt exercise for chronic pain, and the authors state explicitly that the results do not mean any form of exercise will help, nor that anyone should push through pain.

Nagi is a mental health companion, not a medical device, and nothing here is medical advice. If you’re struggling, please reach out to a professional or someone you trust.