Interesting, I was just listening to Tim Ferris' latest podcast with Bas Rutten, where he was promoting the O2 trainer, a similar device for exercising your bre

Interesting, I was just listening to Tim Ferris' latest podcast with Bas Rutten, where he was promoting the O2 trainer, a similar device for exercising your breathing muscles and diaphram. I'm opting to just plugging whichever nostril is clear and using the constricted nostril instead. Seems cheaper and something I can do anywhere. Also helps me utilize my nose instead of being a mouth breather.