Is yoga safe? What injury and safety research shows

Yoga is often described as gentle, which can make it sound risk-free. It is not, but neither is it especially risky compared with other forms of exercise. Research gives a reasonably consistent picture: most yoga is about as safe as other common physical activity, and a small number of practices and situations account for much of the reported harm.

This guide summarises three kinds of evidence, explains what each can and cannot tell you, and turns them into practical choices. It is general information, not an assessment of whether yoga is suitable for you.

Evidence from randomised trials

In 2015 Cramer and colleagues reviewed 301 randomised controlled trials of yoga. Only 94 of them, with 8,430 participants, reported on adverse events at all. In those, they found no differences in the frequency of intervention-related, non-serious or serious adverse events when yoga was compared with usual care or with exercise, and concluded that yoga appears as safe as usual care and exercise. Yoga groups did have more non-serious adverse events than groups receiving psychological or educational interventions.

Trials are the strongest evidence for comparing risk, but they have limits here. Participants are usually screened, classes are designed for the study and supervised, and many trials did not report adverse events. Real-world classes and home practice may differ.

Evidence from emergency departments

Swain and McGwin used a US national sample of emergency-department visits to estimate 29,590 yoga-related injuries treated in emergency departments from 2001 to 2014. The trunk was the most commonly injured region (46.6%), and sprains and strains made up 45.0% of diagnoses. Injury rates rose over the period, and in 2014 were highest in people aged 65 and over: 57.9 per 100,000 participants, compared with 11.9 for ages 18 to 44 and 17.7 for ages 45 to 64.

These are estimates from a sample, and they only capture injuries serious enough for an emergency visit. They also cannot say what people were doing at the time, or whether the injury would have happened in another activity. What they do show is that injuries happen, most are soft-tissue strains, and older adults are more affected.

Evidence from case reports

Case reports describe individual incidents, so they cannot show how common a problem is, but they do show which practices turn up repeatedly. A 2013 review by Cramer, Krucoff and Dobos collected 76 cases. About a third involved the musculoskeletal system, 18% the nervous system and 12% the eyes. Headstand, shoulder stand, lotus position and forceful breathing were the most commonly involved practices.

The authors suggested that beginners avoid advanced postures such as headstand or lotus and advanced breathing techniques such as kapalabhati, that people with glaucoma avoid inversions, and that people with compromised bones or other musculoskeletal disorders avoid forceful or competitive forms of yoga.

What official guidance says

NCCIH, part of the US National Institutes of Health, describes yoga as generally safe for healthy people when performed properly under a qualified instructor. It advises people new to yoga to avoid extreme practices such as headstands, shoulder stands, the lotus position and forceful breathing. It notes that people with conditions such as knee or hip injuries, lumbar spine disease, severe high blood pressure, balance issues or glaucoma may need to modify or avoid some poses, that hot yoga carries particular risks of overheating and dehydration, and that pregnant people should avoid hot yoga.

Practical ways to lower your risk

The evidence points to a few practical choices. None guarantees safety.

Start with beginner-level classes or recordings, and stay with them while you learn.
Leave headstand, shoulder stand, lotus and forceful breathing techniques until you have a teacher who can see you.
Treat sharp, sudden or joint pain as a reason to stop, not to push through.
If you are older, or have balance problems, use a wall or chair for standing balances and choose classes that move slowly between standing and floor.
If you have a medical condition, recent injury, glaucoma or are pregnant, tell your teacher and ask your clinician which positions to avoid.
Be cautious with heated rooms, particularly if you are pregnant or have heart problems.
Ask about a teacher's training and experience, as NCCIH suggests.

The short answer

For most healthy people, yoga practised at an appropriate level appears to be about as safe as other common exercise. Risk rises with advanced inversions and seated postures, forceful breathing, heat, competitive approaches, and age-related or existing conditions. Choosing the level, the style and the teacher with those points in mind matters more than whether the activity is called yoga.