Yoga Evidence by Outcome: Stress, Back Pain, Balance, Falls and Function

Evidence by outcome

Stress, anxiety and depression

NCCIH describes a 2020 review of 12 studies (672 people) of different yoga types for stress in healthy adults that found benefit on perceived-stress measures in all of them.[4] On mental health, it calls yoga a helpful addition to depression treatment and says there is little evidence of benefit for anxiety disorders; a Kundalini yoga trial for generalized anxiety disorder found it less helpful than cognitive behavioral therapy, an established first-line treatment.[4] Label: promising but limited for everyday stress; not a substitute for treatment. See Yoga for Anxiety, Yoga for Depression and Movement, Yoga and Tai Chi for Stress.

Back pain

A 2022 Cochrane review of 21 trials (2,223 people) found small, clinically unimportant improvements in function and pain compared with no exercise at three months, and probably little or no difference in function compared with other back-focused exercise.[3] All trials were at high risk of bias, and none compared yoga with sham yoga.[3] NCCIH reads the research as a slight benefit.[4] The American College of Physicians lists yoga among options for chronic low back pain based on low-quality evidence, and NICE in England suggests considering a group exercise programme, including mind-body approaches, for a flare-up.[11][12] Details are on the low back pain page.

Joints, pain and bone

• Arthritis. A 2019 review of 9 studies found yoga may help knee osteoarthritis pain, function and stiffness, but the research was not of high quality; a 2019 guideline conditionally recommends yoga for knee osteoarthritis, as summarized by NCCIH.[4]
• Fibromyalgia. NCCIH says some individual studies are promising but high-quality evidence is not enough for definite conclusions.[1]
• Bone. Evidence for bone density is weak, and case series describe spinal fractures after forward-bending positions in people with low bone mass.[2][13]
• Scoliosis. The NHS says it is not clear whether back exercises improve scoliosis.[14]

Mobility and function

NCCIH reports a 2022 review of 14 studies (444 people) suggesting yoga may help mobility, balance and quality of life in mild-to-moderate Parkinson's disease.[4] In older adults, a review of 37 trials (3,224 people) found small to moderate improvements in quality of life, depressive symptoms, fear of falling and sleep quality for meditative movement (tai chi, qigong, yoga and Pilates) compared with non-exercise controls, without separating yoga from the others.[15] Label: promising but limited.

Balance and falls

Reviews suggest small gains on balance tests.[9] But the SAGE randomized trial of 700 older Australians found a higher fall rate with its Iyengar yoga program than with seated relaxation yoga, and its authors did not recommend that program for fall prevention.[10] Balance and functional exercise has high-certainty evidence of reducing falls.[16] See Tai Chi for Balance and Fall Prevention.