Holding your breath might not seem like a good idea. If you do it too long, bad things could happen. However, practicing holding your breath might be good for overall health and wellness. Some research suggests it will increase red blood cells, optimize hormone profiles, boost the immune system, and improve mood and memory by decreasing stress.
In this video, I discuss three breathing techniques. Buteyko, which has become popular in the book The Oxygen Advantage. Also Wim Hof method as well as David Blaine breathing.