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just to reiterate - cal in physics is not Kcal. i.e. the word cal we normally use everyday is actually Kcal. so the energy used, in terms of the physics, to move weights is very low. so maybe the 500 cal figure that's been quoted comes from that kind of confusion. Obviously the actual amount of fuel burnt will vary from…
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So physics will show the bare minimum energy required, but total energy used by the body to actually lift the weights is going to be much higher.
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Opps.. accounting for gravity its actuallt 10 joules or 2.3 cal. and the other thing to note is that its cal rather than Kcal!
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Well physics will tell you exacty how many calories are burnt lifting weights (well the absolute minimum at least). ossibly more precisely than cardio, which is quite complex, and HRM are very rough guesses (difficult to directly measure how much work your actually doing from your heart rate, it depends on - how fit you…
