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How does exercise increase oxygen by the cells

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During exercise, your muscles are hard at work. Your breathing and heart rate increase, pulling more oxygen into the bloodstream. As you exercise, the oxygen that reaches your muscles converts available glucose into ATP, providing your body with the energy it needs to complete your workout.

User MandyShaw
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Answer:

During exercise, your muscles are hard at work. Your breathing and heart rate increase, pulling more oxygen into the bloodstream. As you exercise, the oxygen that reaches your muscles converts available glucose into ATP, providing your body with the energy it needs to complete your workout.

User MrCranky
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