Yoga

Moderate-strength evidence from ACP clinical guidelines and multiple meta-analyses shows yoga reduces chronic low back pain and disability compared to usual care or waitlist controls. Effects are comparable to physical therapy and other exercise interventions. Benefits include pain reduction (SMD -0.37 to -1.32), improved function (SMD -0.38), and clinically meaningful improvements sustained at 6-month follow-up. ACP guidelines assign moderate strength of evidence for yoga in chronic low back pain. Yoga is not clearly superior to active comparator exercises; it appears to be one effective option among several.

Meta-analyses consistently show yoga reduces anxiety symptoms compared to usual care or waitlist controls, with effect sizes ranging from small to moderate (SMD -0.43 to -0.91). Effects are seen in both clinical anxiety disorders and elevated anxiety without formal diagnosis. Benefits appear comparable to active comparators including mindfulness-based stress reduction and aerobic exercise. The 2023 systematic review by British Journal of Sports Medicine found yoga superior to active controls for anxiety symptoms in anxiety disorders (though very low certainty evidence). Yoga plus mindfulness showed significant occupational stress reduction in healthcare workers. Effects appear sustained at short-term but less clear at intermediate follow-up for some conditions like PTSD.

Multiple meta-analyses show yoga reduces depression symptoms compared to usual care or waitlist controls with small to moderate effect sizes (SMD -0.35 to -0.69). The 2024 BMJ systematic review found yoga had moderate reduction in depression (Hedges' g -0.55) compared to active controls, exceeding the threshold for clinical meaningfulness. Effects appear comparable to aerobic exercise and relaxation interventions. Sustained benefits for depression in PTSD populations observed at follow-up. ACP-commissioned reviews assign Grade B recommendation for depression/mood disturbance reduction in breast cancer patients during active treatment.

Multiple meta-analyses demonstrate consistent blood pressure reductions with yoga practice. The 2019 Mayo Clinic meta-analysis (49 RCTs, n=3,517) found yoga reduced systolic BP by 5.0 mmHg and diastolic by 3.9 mmHg. Effects were larger (11/6 mmHg) in hypertensive populations when yoga included breathing and meditation. The 2025 systematic review (30 RCTs, n=2,283) found reductions of 7.95 mmHg systolic and 4.93 mmHg diastolic vs usual care. Effects are consistent across prehypertension and hypertension populations. Comparison to active controls shows smaller effects (systolic reduction non-significant, diastolic reduction significant). Evidence quality is consistently rated as very low due to heterogeneity and methodological limitations.

Meta-analyses demonstrate yoga improves balance (SMD 0.64-0.81), lower body flexibility (SMD 0.38-0.69), and lower limb strength (SMD 0.45-0.55) in adults aged 60 and older compared to inactive controls. The 2021 meta-analysis found moderate overall effect size (Cohen's d 0.518) for physical fitness in elderly adults. Benefits are sustained vs active controls for lower limb strength and flexibility. The Annals of Internal Medicine systematic review found moderate-certainty evidence for improved gait speed and lower-extremity strength vs education or inactive controls, though benefits vs active exercise interventions were not demonstrated.

Meta-analyses show prenatal yoga reduces perceived stress (SMD -1.03), anxiety (SMD -0.91), and depression (SMD -0.47) during pregnancy. Yoga reduced labor duration by nearly 2 hours and increased likelihood of normal vaginal birth 2.5-fold. However, all included studies were rated as having high risk of bias, and evidence quality is rated as very low. 2020 systematic review of 5 RCTs found antenatal yoga safely reduces stress, anxiety, depression, and pain during pregnancy.

Grade B recommendations from the Society for Integrative Oncology for anxiety/stress reduction, depression, and quality of life improvement in breast cancer patients during active treatment, based on meta-analyses of up to 15 RCTs (742 participants). Yoga significantly reduced fatigue in cancer survivors (FACIT-F improvements of 3.1-4.0 points, clinically meaningful threshold of 3-5). The phase 3 YOCAS RCT found significant fatigue reduction in both younger and older cancer survivors. However, yoga did not show positive effects for cancer pain reduction in one systematic review. Depression effects showed conflicting results in newer trials, leading to downgrading from Grade A to Grade B.

Network meta-analyses show yoga significantly reduces menstrual pain intensity (MD -1.08 to -2.75 on VAS scale). However, effects are below the clinically meaningful threshold of 2 points in some analyses, and yoga ranked lowest among all active non-pharmacological interventions (exercise, topical heat, acupuncture, TENS, herbs). Evidence is based on only 3 RCTs with 196-1,755 participants depending on the analysis.

Single RCT (n=117, 24-week follow-up) found yoga was noninferior to strengthening exercise for knee OA pain at 12 weeks (both groups improved ~17mm on VAS). Yoga showed greater benefits in secondary outcomes at 24 weeks including WOMAC pain, function, stiffness, quality of life, and depression. Adverse events were more common in yoga group (37.9%) vs strengthening (27.1%) but were generally mild. No serious adverse events.

Network meta-analysis of 29 RCTs (1,755-1,808 participants) found yoga significantly reduced menstrual pain intensity at 8 weeks (mean reduction 2.75 points on 10-cm VAS). Effect was borderline at 4 weeks and became significant by 8 weeks. Single RCT for neuropathic pain due to lumbar disc herniation found yoga significantly reduced neuropathic pain, low back pain, and disability compared to education alone with moderate effect sizes at 6 months.