Rhonda Patrick· PhD
The other way is, and in between, if you will, is there's submaximal exercise test. And there's a number of validated tests that are out there. We could drop those in the show notes. But where you basically are performing a couple of levels of submaximal exercise, measuring your heart rate, and then essentially plug it into an equation that's going to extrapolate and said, okay, well, if this is your rate of increase in heart rate, once you get up to your maximum, this is what your VO2 max value would be. Or there's, I don't know if you have these here, but the shuttle run test or a beep test, where basically you're running back and forth between a set measured distance. And after a point, you're not able to keep up. But it's called a shuttle run test or a beep test. And it basically, the more power you're able to exert, or the more that you can keep up with as you have to get faster and faster to run between these two markers, that also correlates with your VO2 max. So bottom line is all of these are submaximal exercise tests. They're better than just an online questionnaire, even that validated one that I mentioned, because at least it's providing some data about you.