Will an athlete who runs for an hour at moderate pace and is not tired at the end burn more calories than an out of shape person who runs for an hour a way shorter distance but is exhausted at the end?
Assuming both have the same weight and such
What I want to know basically is if your body gets stronger will it need less energy to perform the same amount of work?
In: 1708
Being tired/out of breath is a signal that you’re operating at something approaching your limits.
Work is work though. A 200lb person jogging for 100 metres at the same pace as someone weighing 100lbs is going to use roughly twice the energy.
In general no, it requires a set amount of energy (calories) to do the same amount of work. In fact, work and energy as physical quantities have the same measurement unit (it’s Joule). However, it is possible that training will make your body more efficient at doing work, so there may be less energy wasted (like on needless movements, or panting etc.) and thus less energy spent overall. But being exhausted does not necessarily mean you’ve done more work.
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