Question

breathing rate of adult human being if he is doing excersie​

Answer 1

Answer:

When you exercise and your muscles work harder, your body uses more oxygen and produces more carbon dioxide. To cope with this extra demand, your breathing has to increase from about 15 times a minute (12 litres of air) when you are resting, up to about 40–60 times a minute (100 litres of air) during exercise

Explanation:

Answer 2

Answer:

normal breathing rate could be estimated but during exercise it's differs from person to person,in my opinion.