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When you exercise you use your muscles and your muscles contain Glycogen which could be considered your "energy source". during exercise your muscles use glycogen depleting your energy levels making you feel tired.

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13y ago

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Why does or muscles need more blood during exercise?

When you exercise, you need to move a lot, so you'll need more blood to carry oxygen and do gas exchange to transfer energy.


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Mitochondria make the energy in your body. During exercise you need more energy so you need more energy "factories"


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Name the gas your muscles need more of during exercise?

Oxygen


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Why do you breath very quickly after exercise?

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When you excerise why do you breathe heavy?

In order to operate our muscles, we need a substance called Adenosine Triphosphate (ATP). This provides the energy that our muscles need to contract and give us movement. In order to create ATP, our body needs a substantial amount of oxygen supplied via our blood to the cells. When we exercise, our muscles become overactive and require more and more ATP to function. As a result, our muscles need more oxygen, so we must breathe more (and usually faster) to supply them.