An athlete's breathing rate is determined by
normal range is
a. counting the number of times the chest rises and falls in a minute;
10 to 15
b. listening to the number of times the athlete breathes; 12 to 20
c. listening to the number of times the athlete breathes; 10 to 15
d. counting the number of times the chest rises and falls in a minute;
12 to 20
e. none of these