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English, 04.09.2019 22:30 jaystarr9395

Which statement best describes the relationship between heart rate and time during exercise?
a) the heart rate increases for 6 minutes, remains constant for 19 minutes, and then gradually increases for 5 minutes.
the heart rate decreases for 6 minutes, remains constant for 19 minutes, and then gradually increases for 5 minutes.
the heart rate increases for 6 minutes, remains constant for 19 minutes, and then gradually decreases for 5 minutes.
d)the heart rate remains constant for 6 minutes, increases for 19 minutes, and then gradually decreases for 5 minutes.

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