Population
1 healthy Japanese man, 45 years old, professional hatha yogi with 19 years of practice.
Comparison
Ujjai respiration (1 breath/min) for 1 hour vs Normal spontaneous (control) breathing
Design
Case_report
Authors
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May explain extreme breath-holding in ujjai practitioners; hypothesis-generating for chemosensitivity adaptation to respiratory acidosis.
Intensive practice of yoga respiration (ujjai) allows breathing once per minute for an hour, likely due to physiological adaptation to intermittent respiratory acidosis and hypoxemia.
Miyamura et al. (2002) studied this question.
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