Why you heat up when you exercise? 2) Why is exercising said to “burn calories”?

Human Anatomy & Physiology (11th Edition)
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ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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1) Why you heat up when you exercise?

2) Why is exercising said to “burn calories”?

 

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Step 1: Introduction

Think of muscle contraction during exercise as a little internal workout that happens within your muscles.

When you move, your muscles are like tiny power plants, flexing and squeezing. This movement creates a bit of friction, kind of like rubbing your hands together, and that friction produces some of the heat you feel when you exercise. So, in a way, your muscles are like mini heaters that warm you up as you work out.

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