Are there any exercises you can do to keep your lungs healthy?

30 minutes of moderate-intensity activity every day helps with lung health. It helps to clear mucus, it also improves your lung capacity, and in general, your functional capabilities. In terms of breathing exercises, I can recommend one that is taught in pulmonary rehabilitation classes, which is called pursed lip breathing. This works for anyone anxious or stressed as well. But particularly for those people who have obstructive lung disease like COPD or asthma. What you do is, inhale through your nose, you inhale fully, and then you blow out through your mouth, as if you're blowing out birthday candles. And then you prolong the exhale, at least two to four times longer than the inhale to fully exhale all of that stagnant air.