Fatigue after treatmentEmerging evidence
In the 2025 Cochrane review (21 trials, 2,041 people with any cancer, mostly women with breast cancer), yoga after treatment probably reduced fatigue a little in the short term (5 trials, 602 people; moderate certainty). ASCO and the Society for Integrative Oncology say clinicians "may recommend yoga" for fatigue in adults who have completed treatment, "especially in women with breast cancer", on low-quality evidence.
Sources 3, 4
Fatigue during treatmentMixed evidence
During treatment, the Cochrane estimate was very uncertain (3 trials, 253 people), and the guideline found too little evidence to recommend yoga for or against. A 2025 review of 14 smaller trials during chemotherapy or radiotherapy was more positive, but it used looser rules for which studies to include. For fatigue during treatment, the guideline recommends exercise, cognitive behavioural therapy (CBT) and mindfulness-based programmes.
Sources 3, 4, 20
Breast cancer: quality of life, fatigue and sleepEmerging evidence
In 24 studies of 2,166 women with breast cancer, yoga against no therapy improved quality of life, fatigue and sleep problems in the short term, on moderate-quality evidence, with no clear effect in the medium term. Against other exercise there was no difference, on very low-quality evidence, and no serious side effects were reported.
Source 5
Anxiety and low moodEmerging evidence
A 2023 guideline from the Society for Integrative Oncology and ASCO recommended yoga, among several approaches, for anxiety and for depression symptoms both during and after treatment. Its summary says yoga and mindfulness-based programmes "appear effective", but notes weaknesses in the evidence, including risk of bias and a lack of active comparison groups.
Reviews found small to moderate improvements in depression and anxiety, from studies that varied a lot, while the 2025 Cochrane review rated the effects on depression and anxiety very uncertain. If low mood or anxiety lasts or feels severe, talk to your care team.
Sources 21, 22, 23, 3
SleepEmerging evidence
In 410 cancer survivors with poor sleep (96% women, 75% after breast cancer), 4 weeks of twice-weekly gentle hatha and restorative yoga improved sleep quality and cut sleeping-pill use against standard care, though the comparison group had no class to match the extra attention. Twelve trials in breast cancer agree on a small to moderate effect, and the breast cancer guideline that ASCO endorsed says gentle yoga "can be considered for improving sleep".
Sources 13, 24, 25
Persistent fatigue after breast cancerEmerging evidence
In 31 women with lasting fatigue, 12 weeks of Iyengar-based yoga eased fatigue and raised energy more than health education; sleep and physical performance didn't change.
Source 14
Shoulders after breast surgeryEmerging evidence
In 444 women, 12 weeks of yoga improved shoulder rotation more than an exercise DVD, for a year, but quality of life, fatigue, pain, sleep, anxiety and depression didn't differ.
Source 15
LymphoedemaMixed evidence
NICE says there's no indication that physical activity causes or worsens lymphoedema after breast cancer. The yoga trials are small and mixed: in 28 women, yoga softened tissue and eased symptoms without changing arm size, though swelling rose more after the classes stopped; in 21 women at risk, an adapted Ashtanga programme didn't raise arm volume; in 96 women after a mastectomy, arm volume fell; and a review found short-term gains but no clear long-term benefit.
Sources 10, 26, 27, 28, 29
Prostate cancer and other symptomsMixed evidence
Five small studies of 129 men with prostate cancer suggest possible benefits for erectile function, fatigue and urinary symptoms, but the reviewers say it's "premature to draw definitive conclusions". In 60 breast cancer survivors, yoga eased knee pain from aromatase inhibitors more than massage. A 2022 guideline on cancer pain made no recommendation for yoga.
Sources 30, 31, 32
Gentle or vigorousEmerging evidence
In 35 sedentary breast and ovarian cancer survivors doing 3 supervised hours a week for 12 weeks, everyone stayed in the restorative group against 87% in the vigorous group, where 2 of 15 left with joint pain, and mild to moderate pain affected 10% against 40%. It was a pilot, but it's a good reason to start gentle.
Sources 6, 7
What other reviews addMixed evidence
A 2026 review of 32 studies in breast cancer survivors found that yoga eased fatigue less during treatment than after, and its suggested best weekly dose is exploratory. A review of hatha and Iyengar yoga alone (11 studies) found no clear effect on fatigue, depression or quality of life.
Sources 33, 34
SurvivalMixed evidence
We found no randomised trial showing that yoga improves survival or lowers the chance of cancer coming back, and Cancer Research UK says there's no evidence that yoga can cure or prevent any cancer.
Sources 2, 1
Where the stronger evidence isStrong evidence
For fatigue, exercise in general has stronger evidence than yoga: the guideline says clinicians should recommend exercise during and after treatment. Cancer Research UK suggests 150 minutes of activity a week, strength work twice a week, and balance and flexibility activities, such as yoga, twice a week.
Sources 4, 8