Is WKO4 Stamina Training a Training Curve?

I didn't see anything showing you know you would have a longer time to exhaustion at MLSS or anything like that in that study so I always was curious about how it's been talked about ever since. The standard deviation within the population is quite narrow yeah which suggests to me if there is any change in I call it stamina it's not a large effect or a large difference between individuals because people collapse beyond five minutes of exertion.