Introduction: Some studies have reported the effect of voluntary abdominal breathing on electroencephalography (EEG) but none of them refers to the speed of breathing. This study aims to determine the effects of speed of breathing on mood and electroencephalography (EEG).
Methods: Two speeds of breathing, slow breathing (SB: 4/min) and fast breathing (FB: 120/min), were performed by 10 healthy subjects for 10 min in an eye-closed condition on different days. The EEG data were recorded at pre, during, and post breathing exercises and analyzed every minute. Mood change was tested using a 2-dimensional psychological test instrument.
Results: The results showed an increase in positive affect and pleasure level significantly in FB. Moreover, FB resulted in increased alpha wave after breathing.
Discussion/Conclusion: The results suggested that breathing speed affects mood and electrophysiology changes.