For men taking the the Air Force Physical Fitness Test, the best possible time to run 1.5 miles is in less than
A. 15 minutes, 30 seconds
B. 13 minutes, 36 seconds
C. 9 minutes, 12 seconds
D. 10 minutes, 23 seconds
Please select the best answer from the choices provided

D

the more fit you are, the faster the recovery. your heart rate drops most sharply in the first minute after you stop exercising; it should then fall about 20 beats a minute—a drop of less than 12 beats a minute is considered abnormal. this “recovery heart rate” is measured as part of an exercise stress test.