Key takeaways
- Yoga is a mind-and-body practice from India that combines poses, breathing and meditation.
- Research suggests it can help with some conditions, such as low-back and neck pain, mood and sleep. For many others, the evidence is limited.
- It is generally safe when done properly with a qualified teacher, but injuries happen, mostly sprains and strains.
- Yoga should not replace medical care, and beginners should skip extreme practices.
This article is general information, not medical advice. Talk to a doctor before starting yoga if you have a health condition, an injury or are pregnant.
What is yoga?
The National Center for Complementary and Integrative Health (NCCIH), part of the NIH, describes yoga as “an ancient and complex practice, rooted in Indian philosophy.” In the United States, it usually emphasizes physical postures (asanas), breathing techniques (pranayama) and meditation. Traditional Indian yoga also includes ethical and philosophical teachings, which many modern classes mention only briefly.
What the research shows
NCCIH has reviewed the evidence. The picture is mixed: some benefits look real but modest, and many claims are not yet proven.
Evidence of some benefit
- Low-back pain: a 2022 review of 21 studies found yoga “slightly better than no exercise,” though the difference may not matter much to patients.
- Neck pain: a 2019 review of 10 studies found yoga reduced neck pain and improved range of motion.
- Knee osteoarthritis: a 2019 review suggested benefits for pain, function and stiffness, but the studies were few and of lower quality.
- Depression: yoga may help as an addition to other treatment. A 2017 review found symptoms reduced in 14 of 23 studies.
- Anxiety symptoms: a 2019 review of 38 studies found a “substantial beneficial effect,” though the biggest effects came from studies in India.
- Sleep: NCCIH says yoga “has been shown to be helpful for sleep” in several studies.
- Weight: a 2022 review of 22 studies found reductions in body weight and BMI in people with overweight or obesity.
- Menopause symptoms: a 2018 review found yoga at least as effective as other exercise for hot flashes and mood symptoms.
Limited, mixed or preliminary evidence
- Headaches and migraine: results are promising but not conclusive.
- Anxiety disorders: there is “little evidence of a benefit.” One study found Kundalini yoga less helpful than cognitive behavioral therapy for generalized anxiety disorder.
- PTSD and multiple sclerosis: the evidence is weak or limited.
Claims you may see that the evidence doesn’t support
Websites often say yoga “boosts immunity,” “detoxifies” the body, or “prevents” or “cures” diseases such as diabetes or high blood pressure. NCCIH’s reviews do not support those claims. Yoga is a form of physical activity, and regular activity is good for health, but it is not a treatment for these conditions.
The main types of poses
Poses (asanas) are usually grouped like this:
- Standing poses: build leg strength and balance, such as Mountain and Warrior.
- Seated poses: used for stretching and for breathing and meditation.
- Lying-down poses (on the back or front): gentle stretches and backbends.
- Balancing poses: challenge stability and focus, such as Tree.
- Twisting poses: gentle rotation of the spine.
- Inverted poses: where the head is below the heart, such as headstand and shoulder stand. These carry more risk (see below).
- Restorative poses: supported, relaxing poses, such as Child’s Pose and Corpse Pose.
Most classes mix several kinds. A good teacher will offer easier versions.
How to start safely
NCCIH says yoga is “generally considered a safe form of physical activity” for healthy people when practiced properly under a qualified instructor. The most common injuries are sprains and strains, mainly in the knee or lower leg. Serious injuries are rare.
- Learn from a qualified teacher. NCCIH advises asking about the instructor’s training and experience. Learning on your own has been linked to a higher injury risk.
- Beginners should avoid headstands, shoulder stands, the lotus position and forceful breathing.
- Be careful with hot yoga. It carries special risks of overheating and dehydration.
- Older adults: adults 65 and over have a higher rate of yoga-related emergency visits, so choose gentle classes and tell the teacher about any limits.
- Pregnancy: check with your doctor first. NCCIH advises avoiding hot yoga, long periods of stillness and lying on your back.
- Health conditions: knee or hip injuries, lumbar spine disease, severe high blood pressure, balance problems or glaucoma may call for modified poses. Talk to your doctor and the teacher.
- Don’t push through pain. Stop if a pose hurts.
- Don’t use yoga to delay seeing a doctor about a medical problem.
Frequently asked questions
How often should I do yoga?
The CDC recommends at least 150 minutes of moderate activity a week plus muscle-strengthening on 2 days. Some yoga styles can count toward this, depending on how vigorous they are.
Do I need to be flexible?
No. Flexibility is something yoga builds over time, and a good class adapts poses to your body.
Can yoga replace my medication?
No. Don’t stop or change any treatment without talking to your doctor.
Is it okay to learn from videos?
It is a way to start, but NCCIH notes that unsupervised learning is linked to higher risk. Begin with an instructor if you can.
Sources
- NCCIH, Yoga: Effectiveness and Safety (updated August 2023)
- NCCIH, Yoga: What You Need To Know
- CDC, Adult Activity: An Overview (updated December 2023)
Health note: this article is for general information and is not medical advice. Speak to a qualified health professional about your own situation.