Breatheology by Stig Åvall Severinsen

A practical guide that explains the science and techniques of conscious breathing to improve physical performance, mental clarity, stress resilience, and overall health; it combines physiological research with step‑by‑step exercises and training plans drawn from freediving and respiratory science to teach readers how to increase lung capacity, control breath timing, and use breathing as a tool for relaxation, endurance, and peak performance.