LooooL .. those are the famous myths in gyms man .. don't listen to these grabge .. fat are living cells and muscle are anather living cells .. pont simple point blank .. and muscle don't use fat as fuel until these cells wii be out of the glycogen storge ( which is made from carbohydarte )
taken literally it is BS, but what these people are really trying to say is burning fat and gaining muscle...when a person does burn off fat and gain muscle it seems as if the fat has in fact been converted to muscle and although it's BS, nonetheless, it's an easy concept for the ignorant public to understand
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