Breathwork

Breathwork - deliberate control of the breath - has a growing randomized-trial evidence base for stress and mental health. A 2023 meta-analysis of randomized controlled trials (Fincham et al., Scientific Reports; 12 RCTs, 785 adults) found breathwork produced a small-to-moderate reduction in self-reported stress versus non-breathwork controls (Hedges' g = -0.35, 95% CI -0.55 to -0.14, p < 0.001), with similar pooled effects for anxiety (20 RCTs, g = -0.32) and depressive symptoms (18 RCTs, g = -0.40; both p < 0.0001); most trials carried a moderate risk of bias, so the authors urged cautious interpretation. A 2023 Stanford randomized controlled trial (Balban et al., Cell Reports Medicine; NCT05304000) compared three 5-minute daily breathing practices with mindfulness meditation over one month and found the exhale-emphasized "cyclic sighing" (physiological sigh) produced the greatest improvement in mood and the largest reduction in respiratory rate. Most recently, a 2025 randomized waitlist-controlled trial (Blake, Journal of Affective Disorders; 107 adults) of online conscious connected breathwork reported a large reduction in anxiety on the Zung Self-Rating Anxiety Scale (-10.56 vs -1.89 points versus control; Cohen's d = 1.44, p < 0.001). Technique matters: slow/coherence and exhale-focused breathing favor calm and parasympathetic (vagal) tone, while box breathing supports steady focus. Breathwork is a low-cost, drug-free practice and a useful adjunct - not a replacement for evaluation or treatment of anxiety, mood, or cardiovascular conditions. Intense hyperventilation-retention styles should be practiced seated or lying down and avoided in pregnancy, uncontrolled cardiovascular or seizure disorders, or with a history of fainting. Educational information, not medical advice.

Evidence Scale