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Breath: The New Science of a Lost Art
my questions about breathing. I went to
James Nestor • Breath: The New Science of a Lost Art
The relevance of the above studies suggests that effects similar to those achieved with high-altitude training can be obtained at sea level simply by performing a series of breath holds. Stimulating the spleen to contract by reducing the availability of oxygen causes an increase in hemoglobin and hematocrit, which in turn increases the oxygen-carry
... See morePatrick McKeown • The Oxygen Advantage: The Simple, Scientifically Proven Breathing Techniques for a Healthier, Slimmer, Faster, and Fitter You

Take a deep breath’ is not a helpful instruction,” Meuret wrote. Hold your breath is much better.