Which of the following statements is TRUE about heart rate and exercise?

The commonly used estimate for maximum heart rate is 220 minus your age. For example, a 20-year-old’s estimated maximum is 200 beats per minute. It is not best to exercise as hard as possible, and recommended exercise intensity is not simply 30% of maximum, so “all of the above” is not true. The correct choice is “Maximum heart rate can be calculated by taking 220 minus your age.”

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