Physics of weight lifting
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Nov12-12, 04:53 PM
Your calculation tells you that you are doing 1.6kcal of equivalent useful work. Meanwhile, your body is consuming loads more energy in just performing that exercise - around four times as much.
for some representative values of work done and food consumed. It requires an awful lot of mechanical work to burn off a few pies!
Still, the range I usually see mentioned is around 220-250 "calories", so we're still off by a factor of ~40.