Answer: The aerobic energy system is used for prolonged endurance or exercise. Simply put the cell uses oxygen to burn glucose and make ATP i.e. aerobic production of energy by the oxygen system. Your muscles need a steady supply of ATP during any sustained activity.
Explanation: want to be friends
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Answer: Individuals who exercise on a regular basis are more likely to be self-confident and focused.
Explanation:
That it could spread and go global or they could try and use new vaccines and they could cause them