Question

When we do heavy work or exercise, our heart rate increases and breathing becomes faster and deeper. Why?

Answer 1

Answer:

10. Exercise. During exercise, the muscles and organs need more oxygen from the body's red blood cells. This requires the heart to pump more blood and the lungs to supply more oxygen, resulting in a rapid heartbeat and heavier breathing.

Answer 2

Explanation:

When you do heavy work or exercise your muscles work harder and your body uses more oxygen

SO, your breathing increases about 14 or 15 times a minute because of this