Another of the breathing exercises to help lungs is prolonged breathing out. To do this, breathe in, and breathe out slowly. When breathing out, make sure to prolong it; ideally it should be twice as long as when you breathed in.
This exercise helps your lungs completely expel any stale air, so that you have room for fresh air4.
Lastly, aerobic exercises are good for your lung health. This is because aerobic exercises increase both your breathing and your heart rate. Aerobic exercises are also a good way to put into practice all of the breathing exercises above.
Learn more about Respiratory Health here.