Book (Practical) Living Professor Negoro's hyperventilation method

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Home Economics and life environment studies
Life and Living
Reset your brain fatigue with the base breathing method every 90 minutes backed by cutting-edge medicine! If you learn the Harvard-style breathing method with cutting-edge medical care, you can switch your brain and always bring out your best self. It is common sense among the world's top elites to control your breathing and control your mental and brain arousal.