What held up in two new reviews of yoga and qigong was not balance or strength

Two systematic reviews landed ten days apart this month, one on yoga and one on Health Qigong, both in older adults, both asking whether the practice makes people steadier and stronger. Read side by side, they tell a stranger story than either tells alone.

The yoga paper appeared in Experimental Gerontology on 5 September. The authors screened 3,222 records and kept 21 studies covering 1,471 older adults, then pooled them for lower extremity strength, static balance, dynamic balance, and quality of life (Experimental Gerontology, 2026). The first pass looked encouraging. Dynamic balance improved. Leg strength improved. Quality of life improved. Static balance, the measure of holding one position without wobbling, showed nothing clear.

Then they applied a correction called trim and fill. It estimates how many small disappointing trials were probably run and never published, then feeds their likely results back into the pool to see what survives. The dynamic balance benefit did not. The strength benefit shrank to the edge of meaning anything. Quality of life came through unchanged.

The qigong review appeared in Frontiers in Public Health on 26 August and pooled 22 randomized trials covering 1,791 older adults drawn from seven databases (Frontiers in Public Health, 2026). Different method, different research group, different corner of the literature. Health Qigong added an average of about eighteen metres to how far people could walk in six minutes. It improved balance scores, depressive symptoms, and quality of life. It did not shift activities of daily living, which is the measure of whether a person still manages dressing and bathing and getting themselves to bed unaided. On most outcomes the authors describe the gains as comparable to what conventional exercise produces. Quality of life is the one place they suggest qigong may have something of its own.

Two methods. Two teams. Around 3,200 older adults between them. The physical performance results are either fragile or roughly interchangeable with ordinary exercise, and the finding that turns up in both pools, and holds through the harshest correction either team ran, is the one nobody writes a prescription for.

The ranking that keeps not appearing

I get asked to rank these. In July a woman wrote to ask whether she should give up her Tuesday yoga class and switch to the Feldenkrais Method® lessons she'd been reading about, as though one of them were the right answer and she had spent four years quietly wasting Tuesdays.

Yoga, Pilates, tai chi, qigong, the Alexander Technique, and the Awareness Through Movement® lessons I teach run on different mechanisms and are good at different things. Yoga works largely through held shapes and lengthening. Qigong through slow repeated sequences tied to the breath. My own field sits closest to the sensing end of that spread, nearer to how clearly you register where your weight has landed than to how much force you can produce. Each has its own strengths. Neither review was built to rank one against another, and the yoga authors say outright that their subgroup analyses were too weak to recommend a frequency, a program length, or a session length.

What both reviews can speak to is the thing these practices share, and that thing is quality of life. It sounds like the soft outcome. It is measured with instruments that are not soft at all, and it asks the questions the balance tests never get near: whether you sleep, whether you still do the things you like doing, whether the stairs take up any of your attention on the way down.

What that score is actually recording

Think about what has to shift for someone to answer those questions differently after twelve weeks. Movement rarely declines through one dramatic loss. It narrows. The top shelf becomes the step stool. The bath becomes the shower. You take the aisle seat because standing up mid flight from the middle one has turned into a small piece of choreography you'd rather not perform in front of strangers. None of that registers on a one legged stand test, and all of it registers in how someone answers a questionnaire about their week.

The qigong authors did offer one pattern, held loosely. The programs that moved depression and quality of life furthest were the frequent short ones: three or more sessions a week, running twelve weeks or longer, each session under an hour. Not the long ones.

That matches what I see. A client of mine, sixty nine, spent most of last winter doing one long class on Sundays and reporting almost nothing back to me. In February she switched to roughly twenty minutes on four mornings, and by the middle of March she mentioned, as an aside and not as a result, that she had stopped planning her walk into town around where the stairs were. Same weekly minutes, more or less. Different outcome. Short and frequent gives the nervous system something to come back to before it forgets, and it survives a bad week, because missing one twenty minute morning is not the same as missing the week.

If you already have exercises from a physiotherapist, none of this displaces them. Loading and strength work belong in their own category, and a gentle practice sits alongside what your physio gave you rather than standing in for it. What these two reviews suggest is narrower and more useful than a ranking. Pick the practice you will still be doing in March, take it in short frequent doses, and judge it on the outcome both papers found rather than on the one you assumed you were buying.

Trim and fill is a guess about ghosts. Somewhere there are yoga trials that found nothing, written up or half written up, filed, never submitted. The statisticians estimate how many. What I keep turning over is the people inside them, who showed up twice a week for twelve weeks and then dropped out of the record entirely, and whether any of them, asked directly, would have said their life got better anyway.