Question

2) Richa loves to exercise to keep herself fit, but whenever she exer- cises, she finds herself breathing faster. She is worried if she is unwell.Can you help Richa to understand why she is breathing faster?​

Answer 1

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.