Indian yogis train themselves to decrease the amount of air they take in at rest, not increase it. Tibetan Buddhists prescribed step-by-step instructions to reduce and calm breathing for aspiring monks. Chinese doctors two thousand years ago advised 13,500 breaths per day, which works out to nine and a half breaths per minute. They likely breathed

Take a normal breath in through your nose and allow a normal breath out through your nose. 2. Hold your nose with your fingers to prevent air from entering your lungs. 3. Time the number of seconds until you feel the first definite desire to breathe, or the first stresses of your body urging you to breathe. These sensations may include the need to

Feinstein of carbon dioxide therapy.