I think it's a Silicon Valley[0] reference

[0] https://www.youtube.com/watch?v=_uMEE7eaaUA

Thanks for that ! I've always wondered what the genesis of it was....

I've run lots of trail marathons and halves and have pretty good aerobic function, but I've always had a big problem with breathing while swimming. Does anyone have any good links or thoughts on getting into a good breathing rhythm that doesn't involve running out of steam and ingesting water? My running breathing is very disciplined but it all seems to fall apart when I swim

Have you tried just using nose plugs/clips? There seems to be some variation in how well people can close off their nasal passage while underwater and often people who have more trouble with it sound exactly like this.

Personally I have to be blowing air out my nose at a pretty unsustainable rate to prevent water from coming in, so if I'm doing serious swimming I use clips. Not exploring this option when I was a kid made me resent and hate swim classes even though I loved being in the water.

i'll try that, thanks!

Hi! You typically want to breath out through your noise, then inhale through the mouth when you go for air.

Another tip that comes immediately to mind is try using a swimmer’s snorkel. At first, it’ll be really difficult to keep from water going into your nose but after a few practices, your nose and it’s canals will block out water as a reflex, enabling you to breath through your mouth the entire swim. Hope this helps and sorry for English!