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Once you start to exercise, your body has to make sure that the muscles that are now working much harder receive the oxygen and fuel they need to keep contracting. The various body systems must begin to work faster and harder to meet this extra demand. The muscles start to work harder, requiring more oxygen and producing more carbon dioxide, which needs to be removed

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15y ago
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14y ago

Exercising tires the skeletal muscles. To make your skeletal muscles stronger and to make them tire less quickly, you can practice using those muscles daily to build up strength.

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15y ago

it make it weaker and smaller

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12y ago

Makes bones more porous

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Q: How does skeletal muscle change during exercise?
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