Peter Attia· MD
but if we would do repeated intervals at ascending Pace or ascending like meaning descending pace so ascending effort descending pace so if it was in the pool we would swim hundreds or 200s and do and at change the pace so you'd go out pretty easy for the first one check the lactate fully recover repeat it fully recover repeat it and you're getting faster and faster and faster so then you have you make a graph the x- axis is the speed the Y and we would note heart rate as well but we would really focus on speed and then the y axis was the lactate concentration and it becomes a power curve and again this is very crude so I can imagine that now the methods are much better but you can eyeball them as sort of two separate linear curves and they intersection becomes the inflection point at which you go from kind of sustainable to unsustainable lactate production or nonlinear parabolic lactate production