When you picked up this book, did it occur to you that it was those obedient servants, your muscles, that actually made your action possible? Now, as you read this page, your eyes are made to focus and scan carefully along each line of print by means of delicately balanced muscular forces. All day, every day, the muscles in our bodies are continually contracting and relaxing as we carry out those everyday actions that are normally taken for granted.
KeywordsFatigue Respiration Caffeine NADH Choline
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