name 4 factors that may affect a person's lung capacity?

Answer 1

Infection, congestion, emphysema, bronchitis, asthma, scarring, collapsed lung, cancer, poor muscle tone. More than four, I know.

Answer 2

Lung capacity can be built up. The one exercise you were given will make you aware to breath from your diaphragm (Forget the vanity of holding your stomach in if you want to do this.) It is exactly the same way singers and all wind players learn to breathe. [ The second part of that was not given: when releasing the air, the diaphragm muscles are used to push, always from the bottom up, and no matter how little air is left before the next breathe, do not collapse the expanded rib-cage. You must train yourself to hold that 'out' even when you are nearly out of air. ] The flute, playing a solo to be heard within a full orchestra, because it is overblown and all the air you release does not go into the instrument, takes As Much Air to play as A Tuba! There are some very slight-built female principal flautists who are in the best orchestras in the world. Size has very little to do with it. Training, including breath control and lung capacity, have a Lot to do with it. Best regards.