Lung testing process
It is necessary to take a calm, deep breath while standing or sitting, exhale and hold your breath for 10 seconds. After this, breathing resumes, first with a short breath, then with a deeper one, gradually returning to normal.
If a delay of 10 seconds does not cause discomfort and the desire to breathe deeply, often as after diving, then everything is fine with the lungs. When breathing becomes difficult and the heart rate increases, this indicates that the lungs cannot cope. In this case, you need to urgently consult a therapist and undergo fluorography.