Mood and anxiety: encouraging, from weak studiesMixed evidence
A review of 21 school trials called the results encouraging, but rated 10 trials at high risk of bias, 12 with some concerns and none at low risk, and most were small. In a review of 27 studies, 70% found less anxiety or low mood, but the studies were of weak to moderate quality. Earlier reviews of 9 school trials and 34 controlled studies were also positive, with low-quality studies and no side effects reported.
Sources 4, 17, 18, 19, 20
Harder exercise eased anxiety moreEmerging evidence
In 22 studies of exercise in children and teenagers, exercise training eased anxiety by a moderate amount. Moderate and hard exercise did, but low-intensity programmes and the group of yoga, balance and flexibility programmes didn't make a clear difference.
Source 21
Against PE: about the sameEmerging evidence
In 344 British 9 to 11 year olds, body image and mood improved after 4 weekly yoga lessons, and just as much with normal PE, and the children rated the yoga very highly. In 98 Indian children, the only difference after 3 months favoured PE (social self-esteem). In two small US high school trials, yoga students held steady or improved on mood while PE students worsened on some measures, and in a middle school programme the changes weren't clear.
Sources 5, 6, 14, 22, 23
AttentionEmerging evidence
In one trial of 131 Chinese schoolchildren, 40 minutes of yoga twice a week for 12 weeks improved attention more than PE or no extra activity, with the assessors not told who did what. In 802 Indian teenagers, an hour a day of yoga or of physical exercise for 2 months improved a test of attention and working memory equally.
Sources 7, 24
ADHDMixed evidence
In pooled trials, yoga and similar mind-body exercise improved attention in ADHD but not hyperactivity, emotions or planning skills. A Cochrane review of meditation therapies, two of its four trials of yoga, couldn't draw any conclusions. In 23 preschool children with ADHD symptoms, 6 weeks of yoga gave modest gains on an attention test. Our exercise for ADHD guide says the same: helpful for attention, alongside more active exercise.
Sources 8, 25, 26
Fitness, strength and flexibilityEmerging evidence
In 802 Indian teenagers, aerobic fitness improved just as much with daily yoga as with daily physical exercise. In 232 rural Indian children aged 6 to 11, yoga 5 times a week for 6 months matched PE for muscle force. In one small trial of 54 five-year-olds, two 30-minute yoga sessions a week for 12 weeks improved flexibility, other motor skills and self-esteem more than PE. In rural India, yoga also raised girls' everyday activity. A single session of 10 sun salutations made 100 schoolchildren's trunks more flexible, but there was no comparison group.
Sources 27, 13, 12, 28, 29
Children with autismMixed evidence
A review of 8 studies found the evidence inconclusive: the studies were small and most had no comparison group. A trial of 43 children in special schools reported better gross motor skills, social communication, irritability and withdrawal after 45-minute yoga sessions for 12 weeks. Our exercise for autistic children guide has more.
Sources 30, 31, 32
Asthma, weight and tummy painEmerging evidence
In 5 pooled trials (480 children aged 8 to 16), yoga added to asthma medicines gave small gains in lung function, but asthma control and quality of life didn't change. In 9 studies of children and teenagers with obesity, yoga lowered body mass index (BMI) and body fat.
For long-term tummy pain, one trial (69 children aged 8 to 18) found 58% improved by half or more a year after yoga was added to usual care, against 29% with usual care, though there was no difference during the course. In another, dance and yoga twice a week for 8 months reduced tummy pain in girls aged 9 to 13. Our yoga for digestion guide covers these.
Sources 33, 34, 35, 36, 37
What paediatricians sayEmerging evidence
The American Academy of Pediatrics' report on mind-body therapies, including yoga, says "a growing body of evidence supports the effectiveness and safety of mind-body therapies in pediatrics", and offers them to help concentration, pain, discomfort and anxiety. The review of yoga nidra (guided relaxation lying down) for children that we read was a narrative review, not a trial.
Sources 38, 39