2. 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
The correct answer is D. 134. I don't get it. Can anyone plz explain why? Thanks in advance!
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
The correct answer is D. 134. I don't get it. Can anyone plz explain why? Thanks in advance!