To achieve the maximum benefit from exercising, the heart rate, in beats per minute, should be in the target heart rate (THR) zone. For a person aged A, the formula is as follows.

Find the THR to the nearest whole number for each age. (Source: Hockey, R. V., Physical Fitness: The Pathway to Healthful Living, Times Mirror/Mosby College Publishing.)

(a) 35 

(b) 55

(c) Your age

Transcribed Image Text:

0.7 (220A) ≤ THR ≤ 0.85(220 - A)