Yoga and mental health

Two things are true at once, and most writing on this subject manages only one of them. Yoga does a lot of people a lot of good, including for their mood and their anxiety. And yoga is not a treatment for mental illness.

Holding both matters, because the version that drops the second half causes real harm: someone who is seriously unwell, told that practice and positive effort will dispel their negative thoughts, has been handed an explanation for their continuing illness that blames them for it.

Where this sits in UK guidance

Not nowhere, which is worth knowing. The NICE guideline on depression in adults sets out a menu of first-line options for less severe depression, and among them are group exercise and group mindfulness or meditation, alongside guided self-help, group and individual cognitive behavioural therapy, behavioural activation, interpersonal therapy, counselling and short-term psychodynamic psychotherapy. At that level of severity the guideline also advises against routinely offering antidepressants as the first step.

So movement and contemplative practice are in the guideline, as options among others, for milder difficulties. That is a genuine place in the evidence and a modest one. It is not a licence to extend the claim upwards.

What the evidence does not support

Yoga as a treatment for moderate or severe depression, for bipolar disorder, for psychosis, or for post-traumatic stress disorder on its own. Yoga as a replacement for medication or for therapy. Yoga as a reason to delay getting assessed.

The research that exists is mostly small, short, and hard to blind — nobody can be unaware that they are doing yoga — and much of it compares yoga against doing nothing at all rather than against another active treatment. Comparing an eight-week class against a waiting list will favour the class whatever the class contains. That is a reason to treat yoga as a plausible and pleasant adjunct rather than as a therapy with a strong evidence base behind it.

The mechanisms that make sense, and the ones that do not

Several plausible things are probably doing the work:

• Regular physical activity, which has reasonable evidence of its own for mood.
• A fixed point in the week. Having somewhere to be and something to do is close to the active ingredient in behavioural activation, which is a recognised treatment for depression.
• Other people in the room. Company without the demand to perform socially is a rare and useful combination.
• Attention occupied elsewhere. Holding a position badly requires enough concentration that rumination has to stop, which is a temporary break and a real one.
• Slow breathing, which measurably shifts the body out of a state of arousal, and is the basis of several entirely conventional anxiety management techniques.

What is not supported: that yoga heals the body and the mind; that it dispels negative thoughts and emotions; that it produces a spiritual awareness of one's place in the universe; or that persistence will eventually deliver anything in particular. The first three are claims nobody can test. The fourth is the one that does damage.

Starting, if the point is mental health rather than flexibility

A gentle or beginners' class, a teacher who is told what the aim is, and no concern whatsoever about what anyone else in the room can do. Flexibility is not a prerequisite; it is an occasional side effect. Hatha, yin and restorative styles suit this purpose better than fast, hot or strenuous ones, which are a workout with breathing attached.

Consistency matters more than intensity, and a short practice that actually happens most weeks is worth considerably more than an ambitious one abandoned in a fortnight. On the days when getting there feels impossible, getting there anyway and doing very little is the whole exercise — and that, rather than any posture, is the part that resembles treatment.

Sensible cautions

Physical. Tell the teacher about any injury, pregnancy, recent surgery, high blood pressure, osteoporosis, hypermobility or neck problem. Inversions — headstands, shoulder stands and anything that puts the head below the heart — raise pressure inside the eye and are generally avoided by anyone with glaucoma or a retinal problem, and by anyone who has had eye surgery recently. Heated classes add a strain of their own and are a poor place to start.

Psychological. This is less often mentioned and matters more. Intensive meditation, prolonged breath retention and some breathwork practices can be destabilising for a minority of people — producing anxiety, a sense of detachment from oneself, or intrusive memories surfacing in a room full of strangers. It is more likely in anyone with a history of trauma, and it is a reason to begin gently, to tell the teacher that stillness or closed eyes may be difficult, and to know that stopping and opening your eyes is always allowed. Trauma-sensitive yoga exists precisely because of this, and is worth looking for where it applies.

Teachers. Yoga teaching is not a regulated profession in the UK, and the title carries no guarantee of training — the same situation as with therapists. Registers exist, including the British Wheel of Yoga and Yoga Alliance Professionals, and checking is reasonable. A teacher who offers opinions on medication, diagnoses, or discourages medical treatment has gone well past the limits of what they know, and that is a reason to leave the class rather than a sign of depth.

The bridge worth knowing about

Anyone who finds that this kind of practice genuinely helps, and who wants something with evidence behind it, should know about mindfulness-based cognitive therapy. It takes the attentional training that yoga and meditation share, puts it inside a structured course delivered by trained clinicians, and is recommended in UK guidance for preventing relapse in people who have had recurrent depression.

That is a different proposition from an app or a weekly class, and it is available through the NHS in many areas. It is the obvious next step for someone whose experience is "the breathing helps and I want more of that, properly".

The line that matters

Yoga is a good thing to take up. It is worth doing for its own sake, and for most people it will make some difference to how they feel.

It belongs alongside treatment, never instead of it. Taking up a practice is not a reason to stop medication, to cancel an appointment, or to wait a few more months before asking for help — and the point at which someone most needs a proper assessment is usually the point at which they have least appetite for seeking one. Anyone whose symptoms are more than mild, or who is getting worse, should be seen.

See also mental health, which lists the routes to help and the crisis lines, choosing a therapist and the first therapy session.