Are you having trouble breathing? Are you a mouth breather? Is your sleep partner a mouth breather or snorer? Do you have sleep apnea, asthma, or just feel like you aren't getting a full deep breath?
If your are interested in learning new techniques and need answers to your questions, then this is a great place to start. I listened to this book on the Libby app, the library free app that you can connect to with your local library.
The author takes you through research, interesting observations, and new ideas about how to breath the correct way so you have better health and function. From lowering blood pressure to having a calmer mind and other health benefits. Link here