Yoga benefits: what the research supports, and how to start well

What the research supports

Yoga has been studied in hundreds of trials, many of them small and unblinded, so the honest summary is a list of moderate benefits rather than a cure.

• Low back pain. The 2022 Cochrane review led by Wieland pooled 21 trials and 2,223 participants. Compared with no exercise, yoga brought small improvements in pain and back function at three months, smaller than the threshold patients usually notice. Compared with other back exercise, there was probably little or no difference. In other words, yoga is a reasonable choice of exercise for a sore back, not a superior one.
• Heart risk factors. In the meta-analysis by Cramer and colleagues, yoga lowered systolic blood pressure by about 5.9 mmHg and diastolic by about 4.1 mmHg compared with usual care, and improved waist size, cholesterol and triglycerides. Most trials had a high or unclear risk of bias, and the authors present yoga as an addition to standard care.
• Mood. A 2013 meta-analysis of 12 trials, also by Cramer, found moderate evidence of short-term reductions in depressive symptoms compared with usual care. The US National Center for Complementary and Integrative Health (NCCIH) describes yoga as a helpful addition to treatment for depression, not a substitute.
• Balance and strength. The NCCIH reports that in a 2014 review, 11 of 15 studies in healthy people showed improvement in at least one measure of balance. The NHS lists yoga among muscle-strengthening and flexibility activities.

What yoga does not do on its own

Intensity matters. The 2024 Compendium of Physical Activities rates hatha yoga at 2.3 METs, below the threshold of 3 that marks moderate intensity, and power yoga at 4.0. A typical gentle class therefore counts towards your strength and flexibility work, but most of it does not count towards your weekly aerobic minutes.

On weight, the NCCIH cites a 2022 review of 22 studies showing reductions in body weight and waist size, and notes that the most successful programmes involved longer and more frequent sessions, at least 75 to 90 minutes three times a week, along with changes in eating and activity. Yoga can help, but not as a shortcut.

Choosing a style

Most of the trials in the Cochrane review used iyengar, hatha or viniyoga, which are slow and posture-based. They are the safest place to start.

• Hatha and iyengar. Held postures, often with blocks and straps. Good for learning alignment.
• Vinyasa and power yoga. Postures linked into a continuous flow. More demanding on the heart and shoulders.
• Hot yoga. Practised in a heated room. The NCCIH warns of specific risks of overheating and dehydration.
• Restorative and yin. Long, passive holds. Close to a stretching routine.

If your main goal is core strength and controlled movement, compare with Pilates, which shares much of the mat work.

How to start: your first four weeks

1. Book a beginners' course. The NCCIH notes that learning yoga alone, without supervision, has been associated with more injuries.
2. Skip the extreme postures. Beginners should avoid headstands, shoulder stands, the lotus position and forceful breathing techniques.
3. Work to mild tension, never pain. The most common yoga injuries are sprains and strains, most often at the knee or lower leg.
4. Add a short home practice. Ten minutes on a non-class day, repeating what you learned, keeps the sequence fresh until the next class.

Many classes end with a few minutes of slow breathing. The calculator below sets a calm pace for that part; the evidence on slow breathing is covered in our guide to coherent breathing.

How often to practise

The NHS recommends muscle-strengthening activities on at least two days a week, and yoga can cover them. For flexibility, the American College of Sports Medicine recommends exercises for each major muscle group, adding up to 60 seconds per exercise, on at least two days a week. Two sessions of 45 to 60 minutes meet both.

The week should then add aerobic activity: brisk walking, cycling or swimming, 150 minutes in total. A practical pattern is yoga on two days, aerobic sessions on three, and one rest day.

Precautions

The NCCIH considers yoga generally safe for healthy people taught by a qualified instructor, and its injury risk is lower than that of high-impact activities. The Cochrane review found more adverse events with yoga than with no exercise, mainly a temporary increase in back pain, but no more than with other exercise.

• People over 65 should be more careful: the rate of yoga injuries treated in emergency departments is higher in this group.
• Knee or hip injuries, lumbar spine disease, severe high blood pressure, balance problems and glaucoma may call for modified postures.
• In pregnancy, avoid hot yoga and long periods lying on your back.

If you have one of these conditions, are pregnant, or have back pain that is new, severe or spreading down a leg, talk to your doctor before starting, and tell your teacher before the class.

Pair yoga with a week you keep, on Never Skip Club

Yoga covers flexibility and part of your strength work; the rest of the week still needs aerobic and strength sessions. Create your free account, build guided strength sessions in a minute for the days between classes, and start a crew of three to seven friends with a weekly rhythm that rewards regularity, not extra sessions. If you want an expert eye on your posture or programme, find a coach from our network, or sign in if you already have an account.