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pantheid
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People jog, thereby expending energy, and lose weight because of it. As modern people who understand mass energy equivalence, we know (or can presume) that during the process of running, the body derives its kinetic energy by breaking down ATP in the cells. When this breakdown occurs, the total mass present decreases and eventually the person loses significant amounts of weight (please let me know if anything here is factually incorrect).
Since people have known for millennia that running leads to weight loss, how was it explained before E=mc^2.
Since people have known for millennia that running leads to weight loss, how was it explained before E=mc^2.