How does your body burn 2000 calories a day without any effort, but running a mile only burns 100 calories?
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Let’s say it takes you 15 minutes to run a mile. There are 24 hours a day, which is 96 times 15 minutes, so per 15 minutes, doing nothing burns 2000/96 which is about 21 calories.
So running consumes almost 5 times more energy than not running.
Your body still does a bunch of work when not running (pumping blood, breathing, digesting, filtering, regulating temperature, destroying cells, creating new cells), it has to take some amount of energy.
All in all it’s not that surprising that staying alive takes energy and running while staying alive takes a bunch more energy.
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