Time-to-onset and temporal dynamics of EEG during breath-watching meditation

Introduction: Mind-body practices like meditation improve mental well-being. Prior EEG research commonly reports alpha and theta power increases during meditation, but the time-to-onset and temporal dynamics of these changes remain unclear. Method: We recorded 128-channel EEG during breath-watching meditation in meditation-naïve controls (n=28), novice meditators (n=33), and advanced meditators (n=42; Isha Yoga tradition). EEG was segmented into 1-minute intervals; the first 30 seconds served as baseline. Within-group power differences (baseline vs. cumulative 1-minute segments) and between-group differences at 0.5, 3, 6, and 9 minutes were analyzed. Results: Significant increases in alpha, theta, and beta1 power and decreases in delta and gamma1 power emerged around 2–3 minutes and tended to peak between 7–10 minutes across all groups. Advanced practitioners showed greater magnitude effects, with higher theta and theta-alpha power at all time points versus others, and lower delta and gamma at selected times. Conclusion: Neurophysiological changes begin ~2–3 minutes after starting breath-watching and peak around 7–10 minutes in all groups, with larger effects in advanced meditators. Brief meditation sessions of ≥7 minutes delivered digitally may provide accessible, effective, and scalable benefits for mental well-being.