Doctors use the term maximum heart rate (MHR) when referring to the quantity found by

starting with 220 beats per minute and subtracting 1 beat per minute for each year of a

person's age. Doctors recommend exercising 3 or 4 times each week for at least 20 minutes

with your heart rate increased from its resting heart rate (RHR) to its training heart rate

(THR), where THR = RHR +.65 (MHR - RHR)

Which of the following is closest to the THR of a 43-year-old person whose RHR is 54 beats

per minute?

A. 197

B. 169

C. 162

D. 134

E. 80

Question

Mathematics

Latte

28 October, 06:38

Doctors use the term maximum heart rate (MHR) when referring to the quantity found by

starting with 220 beats per minute and subtracting 1 beat per minute for each year of a

person's age. Doctors recommend exercising 3 or 4 times each week for at least 20 minutes

with your heart rate increased from its resting heart rate (RHR) to its training heart rate

(THR), where THR = RHR +.65 (MHR - RHR)

Which of the following is closest to the THR of a 43-year-old person whose RHR is 54 beats

per minute?

A. 197

B. 169

C. 162

D. 134

E. 80

+4

Answers (1)

Know the Answer?

Baron Hayden · Answer 1

THR = RHR + 0.65 (MHR - RHR)

For a 43 year old person, MHR = 220 - 43 = 177

THR = 54 + 0.65 (177 - 54) = 54 + 0.65 (123) = 54 + 79.95 = 133.95 ≈ 134.