Ireland’s Patrick McKeown is perhaps the world’s foremost authority on breathwork, and his 2015 book The Oxygen Advantage and 2021 book The Breathing Cure are two of the most important books written on how to adopt “simple, scientifically proven breathing techniques” to (as one of these books’ subtitle states) help maximize fitness and heighten athletic performance; improve sleep, focus, and concentration; eliminate asthma symptoms; and maintain weight loss. Sound too good to