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when you exercise we have 3 energy systems that all start at the same time but last for different times.

They are the ATC-PC system the Lactic acid system and the Aerobic system.

The energy systems last different times, the ATC-PC lasts for 8-12 seconds. The Lactic acid system lasts for 3-5 minuets and the Aerobic system is an unlimited source of energy and will only run out if we lose oxygen.

When the exercise period goes over 30 minuets the Aerobic system continues on its own

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12y ago

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