Raynaud's phenomenon and exercise

What the research found.

• One systematic review of behavior change interventions for Raynaud's phenomenon covered eight studies and a total of 495 participants. The median study size among those eight studies was just 29 people. It concluded that there's no evidence either to support or to refute the claim that those interventions work.

  Daniels and colleagues, BMJ Open, 2018

• An expert panel rated thermal biofeedback for primary Raynaud's as efficacious, which is a word worth reading with care. That rating rested on three randomized trials conducted in independent laboratories. The panel noted that the positive trials tended to be small ones, which is a caveat of its own.

  Karavidas and colleagues, Applied Psychophysiology and Biofeedback, 2006

• In a randomized comparison, silver-lined gloves and ordinary gloves performed identically as each other on every measure. There was no difference in the Raynaud's condition score between types. Both of them reduced that score from 6.4 to 3.9, which is a substantial fall from something that costs very little.

  Liem and colleagues, Rheumatology, 2022

• Twelve weeks of interval training in limited cutaneous systemic sclerosis raised peak oxygen uptake in both of the exercise arms. The rise in skin oxygen tension reached an effect size of 0.93. It didn't reach significance, at a P value of 0.59, which is nowhere near the usual bar.

  Mitropoulos and colleagues, Arthritis Research and Therapy, 2018

What the systematic review concluded

The most complete assessment of behavior change interventions in Raynaud's phenomenon covered eight studies and 495 participants. Its conclusion, printed plainly, was that there's no evidence to support or refute claims that they work. That covers relaxation, stress management, and every related approach to it.

The reasons behind it matter more than the verdict does. The median study size was 29 people, and all but one of the eight studies was at high risk of bias. A field built from studies that small, with that much risk of bias, can't answer its own question in either direction.

That's a different statement from saying these approaches don't work. Absent evidence and evidence of absence get conflated constantly in writing about this condition, and the distinction is the whole reason this page exists. Something untested isn't something disproven, and it also isn't something you should be sold with confidence.

The biofeedback exception, and how to read it

An expert panel reached a different conclusion about one specific technique. Thermal biofeedback for primary Raynaud's was rated as efficacious, on the basis of three randomized trials conducted in independent laboratories. That rating comes from a psychophysiology efficacy scale rather than from a clinical guideline, which is a lower bar than it sounds.

Two things in the panel's own reasoning are worth knowing. It noted that the positive trials tended to be small. It also explained away a large negative randomized trial on the grounds that the trial didn't effectively teach handwarming skills.

That second point is where a reader has to make a judgment. Dismissing a large negative trial because the technique wasn't taught well is sometimes the right call and sometimes how a favorable conclusion survives contrary evidence. Our record for that paper flags the explanation specifically, and this page passes it on rather than resolving it, because the resolution isn't ours to make.

Gloves, where there is a clean answer

The one question in this area with a clear randomized answer is whether special gloves outperform ordinary ones. In a trial in people with systemic sclerosis, silver-lined and ordinary gloves produced no difference in the Raynaud's condition score between types, at 0.067 on an interval from negative 0.006 to 0.19. Both of them reduced it from 6.4 to 3.9.

That's a useful result in two directions at once. Gloves helped, substantially, which is worth knowing for anyone who has wondered whether keeping warm is doing anything measurable. The expensive form didn't help more, which is worth knowing before you spend money on technology, because warmth is the part that works.

The practical implication here goes further than gloves alone. The vascular response involves core temperature as well as local cold, which is why warming your body as a whole counts at least as much as warming your hands. A warm coat is doing something a heated glove can't.

Exercise, and what to expect from it

No trial has shown that exercise reduces Raynaud's attacks. The nearest evidence comes from an interval training trial in limited cutaneous systemic sclerosis, where 34 people were randomized to cycling intervals, arm-cranking intervals, or control, twice weekly for 12 weeks. Peak oxygen uptake rose in both exercise arms.

The vascular measurement in that trial is the one people quote and it needs care. Transcutaneous oxygen tension rose in the arm-cranking group with an effect size of 0.93, which is large, and a P value of 0.59, which is nowhere near significance. With 34 participants split three ways, that's a trial without the power to answer its own question.

So the case for exercising with Raynaud's is the same case anyone else has, plus a measurable fitness gain in a related population. Expecting fewer attacks is what the evidence doesn't support. Going in with that expectation is how a reasonable program comes to feel like a failure.

What is left that's worth doing

Keeping warm helps and the glove trial demonstrates it, at any price point. Stopping smoking is the change with the clearest mechanism and the clearest benefit available to anyone who smokes here, though it isn't specific to this condition. Both of those are supported well enough to recommend without qualification.

Everything else in the non-drug area is untested rather than disproven. Relaxation, stress management, and similar approaches may help you and the research can't say, which makes trying one a personal experiment rather than following evidence. That's a legitimate thing to do as long as you know which it is.

The most important thing on this page isn't a treatment at all. New Raynaud's after forty, attacks affecting the two hands differently, fingertip ulcers, or Raynaud's alongside joint pain, a rash, dry eyes, or reflux all point toward a connective tissue disease. Those features are worth an appointment, and they matter more than any of the choices above.

Common misconceptions.

Cautions specific to this condition.

• Take new Raynaud's after the age of forty to a doctor, because a secondary cause becomes more likely with later onset.
• Report any fingertip sore or ulcer promptly, since these are difficult to heal and are a marker of more serious disease.
• Warm your whole body and not only your hands, because the response is to core temperature as well as to local cold.
• Smoking affects blood vessels directly, which is why stopping is the single most valuable change on record here. Your team can help with how.
• No trial has shown training reduces attacks. What it has shown is a change in fitness, which is a different thing from what most people come here hoping for.
• Mention joint pain, a rash, dry eyes, or reflux alongside your Raynaud's, because that combination points at a connective tissue disease.

Questions patients ask.