> Take in a diaphragmatic inhale, hold for 4 seconds, release for 6 seconds (technique used by Navy SEALS). I found many mentions of another approach advertise

> Take in a diaphragmatic inhale, hold for 4 seconds, release for 6 seconds (technique used by Navy SEALS). I found many mentions of another approach advertised as used by Seals: square or box breathing, discussion on HN: https://news.ycombinator.com/item?id=13508038 https://news.ycombinator.com/item?id=13508038