Incorporating a breathing practice, with breath retention, and focus on expelling all the air out of the lungs helps invigorate and cleanse the lungs. Many yoga studios offer a pranayama class or incorporate pranayama in their scheduled classes.
4) Tongue Scraping / Tongue CleaningEver notice that slimy white (or sometimes yellow, if you’re sick) film on your tongue? Sounds, gross, I know, but that’s the mouth’s eliminatation system and one of the causes of bad breath (the rest of it is coming from your digestive system). A tongue scraper can be used to scrape off coated tongues first thing in the morning.