Given: A 50-year-old man with a resting heart rate of 70 beats $\bullet$ min^-1.What is the target heart rate range as determined by the heart rate reserve method?

Question

Quizplus · Accepted Answer

To determine the target heart rate range using the heart rate reserve method, you first need to calculate the heart rate reserve (HRR) which is calculated as maximal heart rate - resting heart rate.

Maximal heart rate for a 50-year-old man can be estimated as 220 - age = 220 - 50 = 170 bpm.

HRR = maximal heart rate - resting heart rate = 170 - 70 = 100 bpm.

Next, the target heart rate range is calculated as follows:

Lower end of target range = (HRR x 0.5) + resting heart rate = (100 x 0.5) + 70 = 120 bpm

Upper end of target range = (HRR x 0.85) + resting heart rate = (100 x 0.85) + 70 = 155 bpm

Therefore, the target heart rate range is 130-150 beats per minute, and the best choice is C.

Given: a 50-Year-Old Man with a Resting Heart Rate of 70