References & Endnotes
Key sources behind this guide — linked directly to the source where available
LeDoux JE. "Emotion Circuits in the Brain." Annual Review of Neuroscience, 2000;23:155-184. View study ↗ ↩ back to text
McEwen BS. "Protective and Damaging Effects of Stress Mediators." New England Journal of Medicine, 1998;338(3):171-179. ↩ back to text
Lupien SJ, McEwen BS, Gunnar MR, Heim C. "Effects of Stress Throughout the Lifespan on the Brain, Behaviour and Cognition." Nature Reviews Neuroscience, 2009;10(6):434-445. View study ↗ ↩ back to text
Ma X, Yue ZQ, Gong ZQ, et al. "The Effect of Diaphragmatic Breathing on Attention, Negative Affect and Stress in Healthy Adults." Frontiers in Psychology, 2017;8:874. ↩ back to text
Weitzberg E, Lundberg JON. "Humming Greatly Increases Nasal Nitric Oxide." American Journal of Respiratory and Critical Care Medicine, 2002;166(2):144-145. View study ↗ ↩ back to text
Balban MY, Neri E, Kogon MM, Zeitzer JM, Spiegel D, Huberman AD. "Brief Structured Respiration Practices Enhance Mood and Reduce Physiological Arousal." Cell Reports Medicine, 2023;4(1):100895. View study ↗ ↩ back to text
Meuret AE, Ritz T. "Hyperventilation in Panic Disorder and Asthma: Empirical Evidence and Clinical Strategies." International Journal of Psychophysiology, 2010;78(1):68-79. View study ↗ ↩ back to text
Thayer JF, Hansen AL, Saus-Rose E, Johnsen BH. "Heart Rate Variability, Prefrontal Neural Function, and Cognitive Performance: The Neurovisceral Integration Perspective on Self-Regulation, Adaptation, and Health." Annals of Behavioral Medicine, 2009;37(2):141-153. View study ↗ ↩ back to text
Lehrer P, Vaschillo E, Vaschillo B. "Resonant Frequency Biofeedback Training to Increase Cardiac Variability: Rationale and Manual for Training." Applied Psychophysiology and Biofeedback, 2000;25(3):177-191. View study ↗ ↩ back to text
Porges SW. "The Polyvagal Perspective." Biological Psychology, 2007;74(2):116-143. ↩ back to text
Šrámek P, Šimečková M, Janský L, Šavlíková J, Vybíral S. "Human Physiological Responses to Immersion Into Water of Different Temperatures." European Journal of Applied Physiology, 2000;81(5):436-442. ↩ back to text
Pennebaker JW, Kiecolt-Glaser JK, Glaser R. "Disclosure of Traumas and Immune Function: Health Implications for Psychotherapy." Journal of Consulting and Clinical Psychology, 1988;56(2):239-245. View study ↗ ↩ back to text
Institute for Health Metrics and Evaluation. "Global Burden of Disease Study 2023: Trends in the Global Prevalence and Burden of Mental Disorders." IHME, 2025. ↩ back to text