Why does the rate of breathing increase while?

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.

What happens to your breathing rate when you exercise class 7?

a) When we do exercise then our breathing rate increases because oxygen is needed to burn calories more efficiently. Since, the blood picks up oxygen in the lungs and demand for oxygen increases during exercise, the lungs must work harder.

In which do you breathe the faster?

When you are doing increased physical activity, such as cycling, running or climbing, your breathing becomes faster. As well as bringing oxygen into the body more quickly, this speeds up the process of getting rid of carbon dioxide. Your brain sends out instructions to your body to increase the rate of respiration.