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Well, reading that and testing how long I can breathe out and hold it is how I noticed iOS stopwatch can be swiped left/right and has a cool analogue stopwatch display.

> "Having a control pause of less than 25 seconds is poor and 25 seconds to 35 seconds means there is room for improvement. The goal is to reach a comfortable breath hold time of 40 seconds. The average control pause of students attending our clinics is around 15 seconds."

5 seconds feels like a long time, 15 seconds is as far as I could go first couple of tries, 20-25 seconds my upper body/throat gets twitchy trying to reopen, then I pushed it to 30 seconds a couple of times, and just now 40 seconds.

I'm suspicious that something I can go from "poor" and "average" to the goal(?) in about 10 tries can be so serious - unless you're supposed to be able to do that between every breath?

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