Overview
Guided breathing at clinically validated rhythms to activate the parasympathetic nervous system. Includes Box Breathing (Navy SEALs protocol), 4-7-8 Relaxation (Dr. Andrew Weil), and Coherent Breathing patterns.
Clinical Evidence
- Coherent breathing at 5–6 breaths/min maximizes heart rate variability (HRV), a key marker of autonomic flexibility (Lehrer & Gevirtz, 2014).
- Slow-paced breathing activates the vagus nerve, shifting from sympathetic to parasympathetic dominance (Gerritsen & Band, 2018).
- Box breathing reduces cortisol levels and subjective stress in high-stress populations (Ma et al., 2017).
- Controlled breathing shows significant reductions in PTSD symptoms when used as adjunct therapy (van der Kolk et al., 2014).
References
- Lehrer, P. M., & Gevirtz, R. (2014). Heart rate variability biofeedback. Frontiers in Psychology, 5, 756.
- Zaccaro, A., et al. (2018). How Breath-Control Can Change Your Life. Front. Hum. Neurosci., 12, 353.
- Ma, X., et al. (2017). The Effect of Diaphragmatic Breathing. Frontiers in Psychology, 8, 874.
- Brown, R. P., & Gerbarg, P. L. (2005). Sudarshan Kriya Yogic Breathing. JACM, 11(4), 711–717.
Technical Implementation
GSAP timeline-driven animation with customizable inhale/exhale/hold durations. Ambient audio atmosphere layer. Visual progress ring for phase tracking. Multiple preset patterns with clinical rationale.