DIY VO2 max mask

Has anybody tried building one of these? Accurate VO2 Max for Zwift and Strava : 7 Steps (with Pictures) - Instructables

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No, but definitely going to give it a try.

Parts on order!

This is fascinating. As an electrical engineer myself, I’m sitting here thinking, “D’oh! Why didn’t I think of that!”.
I’d be curious to hear anyone’s reports of using it, although presumably few people will be able to compare it to lab grade equipment.

Now we just have to get the ANT+ guys to add a “VO2” profile and I’ll be riding around outdoors with this strapped to my head while it’s paired to my head unit :joy: