Question

If Samantha is 35 years old and her resting heart rate is 70 beats per minute, what is the lower end of Samantha’s target heart rate zone for vigorous exercise?

(1 point)
Responses

132.5

132.5

150.5

150.5

172.5

172.5

147.5

Answer 1

First compute max heart rate: 220 − 35 = 185 bpm.
Heart rate reserve = 185 − 70 = 115 bpm.
Lower end (70% intensity) = 115 × 0.70 + 70 = 80.5 + 70 = 150.5 bpm.

Answer: 150.5