| http://www.w3.org/ns/prov#value | - Weegy: The first source of energy for metabolism during any exercise is creatine phosphate. (More)QuestionExpert AnsweredUpdated 7/25/2012 8:45:37 PM1 Answer/CommentValeria01The first and major source of energy for the body is carbohydrate, a food group composed mainly of carbon, hydrogen and oxygen.
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