How does your body burn 2000 calories a day without any effort, but running a mile only burns 100 calories?
In: 7671
You’re basically a sack of water. It takes a lot of energy to keep an uninsulated sack of water at 100 degrees F all day. Try keeping a 150lb sack of water at bath temperature for any length of time. You’re likely going to instinctively burn something to keep the water warm. That’s what your body is doing. Slow and controlled burning to keep that sack of water at operating temperature.
In short: chemical energy is way more efficient and energetic than mechanical energy. It takes a surprisingly small amount of work to move 150lbs of water than to keep it a constant temperature.
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