Try this 13 min exercise, and share your experience in the comment section?

— Set #1: 8 seconds inhale / 5 hold / 17 exhale / 7 hold
— #2: 6/5/19/9
— #3: 4/5/21/11
— #4: 2/5/23/13

Repeat each set 5x

(You n'ai need to download the app)