Yoga Explained: What It Is, Who Practices It and What the Research Supports
Say “yoga” and many people picture a cross-legged figure on a mountaintop, or someone twisted into an impossible pose. The reality is much more ordinary. Most people who practice yoga today do so in a class or at home, and they do it to feel better. Here is what yoga involves, who does it and what science says.
What is yoga?
According to the National Center for Complementary and Integrative Health, yoga is an ancient and complex practice rooted in Indian philosophy. Although classical yoga includes other elements, yoga as practiced in the United States typically emphasizes physical postures (asanas), breathing techniques (pranayama) and meditation (dhyana). You do not have to be flexible to start. Styles range from slow and gentle to athletic, which we describe in yoga postures: an introduction to asanas and styles and in what is yoga?.
How common is it?
Very. A national survey found that the share of U.S. adults who practiced yoga rose from 5.0 percent in 2002 to 15.8 percent in 2022. In 2012 survey data, 94 percent of adults who practiced yoga did so for wellness-related reasons, and 17.5 percent did it to treat a specific health condition. Some did both.
What does research say about the benefits?
The honest answer is: some benefits, small to moderate, and not for everything. Research suggests that yoga may help improve general wellness by relieving stress and improving mental and emotional health, sleep and balance. For low-back pain, a 2022 review of 21 studies found yoga slightly better than no exercise, although the small difference may not matter to patients. For depression, yoga can be a helpful addition to treatment, not a replacement. In a 2019 study of 227 people, those in a yoga group were 37 percent more likely to have quit smoking by the end of the 8-week program, but 6 months later there was no difference between the groups. Yoga should not be seen as a cure for any disease.
Can yoga help you lose weight?
There is some evidence that it can help. The NCCIH reports that a 2022 review of 22 studies with 1,178 participants who had overweight or obesity showed reductions in body weight, BMI, body fat and waist size, and that a 2013 review of 17 yoga-based weight-control programs found that most led to gradual, moderate weight loss. The programs with the best results had longer and more frequent sessions, at least 75 to 90 minutes and at least 3 times a week, and ran for 3 months or more. So yoga can be one part of a weight plan, together with food choices and other activity.
Is yoga safe?
It is generally considered safe for healthy people when performed properly, under the guidance of a qualified instructor. Injuries can occur, as in any physical activity. The most common are sprains and strains, and the knee or lower leg is the part of the body most often injured; serious injuries are rare. If you are new to yoga, avoid extreme practices such as headstands, shoulder stands, the lotus position and forceful breathing, and be aware that hot yoga has special risks related to overheating and dehydration. Learning yoga on your own without supervision has been associated with increased risks. Pregnant women, older adults and people with health conditions should talk to their health care provider and the instructor first.
How should you start?
Pick a beginner class or a good video for beginners, tell the teacher about any injuries and go at your own pace. Our guide to basic yoga postures and their variations covers simple poses, and how to start yoga safely explains what to know if you have diabetes. Read the NCCIH overview of yoga’s effectiveness and safety for the full details.