Calculate the heart rate reserve for a 40 year old with the resting heart rate of 75

Answer : (b). 105 bpm

Explanation :

given that,

Age = 40 years-old

Resting heart rate = 75 bpm

We know that,

Maximum heart rate = 220- Age

Maximum heart rate = 220-40 = 180 bpm

Heart rate reserve = Maximum heart rate - Resting heart rate

Heart rate reserve  = 180 bpm - 75 bpm

Heart rate reserve = 105 bpm

Hence, this is the required solution.

(I know this bc I've done this question.)

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I did the same thing in school and the answer is B

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