Put your hand on the lower part of your chest and count the number of breaths and inspirations per minute. When calm, breathe 19-20 times per minute. During manual labor, breathing is obviously accelerated, reaching about 40 times per minute. However, in this case, people who exercise regularly breathe quite deeply and smoothly.
If you find that through regular exercise, your breath is getting longer and deeper, which is a good phenomenon. Short and shallow breathing during physical activity means the beginning of overwork and the need for rest.
The average vital capacity of healthy adult males is 3500-4500 cubic centimeters; The average vital capacity of healthy adult women is 2000-3000 cubic centimeters.