it become fast because 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.
εïз - ❝ I hope it helps! ^^ ❞
Kindly föllow me for more answer, Thankyou! :3
