Box Breathing is a pranayama technique used to manage stressful situations. It has been out there for hundreds of years but it has become super popular among navy SEALS! so, if it works for them, it will definitely work for you and me, right?
The reason why is called box breathing is that it happens in 4  equal counts. Breathing in 4 secs, holding it in 4, breathing out in 4 and holding with an empty stomach in 4.