Yoga and the mind: from the Yoga Sutra to today’s clinical trials

The Sanskrit word yoga is linked to the idea of union or yoking. One of the best-known texts, the Yoga Sutra, attributed to the sage Patañjali and usually dated by scholars to the first centuries of the common era, defines yoga as the stilling of the movements of the mind. In this text, bodily postures take up little space. What matters are ethics, breathing, concentration and meditation.

Modern yoga

Yoga with series of bodily postures, which we see in many cities today, developed mainly in the twentieth century, in India and then in the West, combining old traditions with physical exercises. Today there are many styles: some slow and meditative, others very physical.

What the evidence says

There are many studies of yoga, but they are often small and of varying quality. Even so, some conclusions are consistent:

• Depression and anxiety: meta-analyses by Holger Cramer and colleagues have found that yoga can reduce symptoms moderately compared with no treatment. Compared with other physical exercise, the difference is smaller.
• Back pain: a 2022 Cochrane review found that, for chronic low back pain, yoga may slightly reduce pain and improve function compared with no exercise. Compared with other exercise, the results are similar.
• Stress: many studies show that practitioners feel calmer after sessions, especially in styles that include slow breathing and rest at the end.

Yoga is not a flexibility contest. The aim is not to reach your toes but to notice how you breathe when you try.

Safety

Yoga is generally safe when practised with care, but injuries do happen, especially when people force the body into difficult postures. People with neck or back problems, high blood pressure or pregnancy should choose gentle styles and talk to a doctor or an experienced instructor.

How to start

1. Choose a gentle style for beginners, with an emphasis on breathing.
2. Ten to fifteen minutes a few times a week is a good start.
3. Listen to your body: tension yes, sharp pain no.
4. Do not skip the rest at the end, lying down, breathing calmly. For many people this is the most precious part.