The Limits of Running Intensity

Research shows that first ventilatory threshold very consistently falls between 77 and 81 % of maximum hartright? I mean, o there is inter individual varied ability there. So i always advocate testing, but you're probably pretty safeof if you happen to know the one size fits all formulas for rag heart right? That you actually t the co the kondof testing. Wich requires some very painful exertion. But you so 77 to 81 % of max hartriht s is where it lies. Oka interesting. Now, i think that'sa, thatthat, that's some good kind of background, i think, on 80 20. And we can move into maybe