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Answer:
2.)Your heart is continuously beating to keep blood circulating throughout your body.
3.)After exercise the heart increase and eventually returns to resting pulse.
4.)You can calculate your maximum heart rate by subtracting your age from 222. For example, if you're 45 years old, subtract 45 from 222to get a maximum heart rate of 175. This is the average maximum number of times your heart should beat per minute during exercise.
Explanation:
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