How to differentiate from good fatigue and bad fatigue
The term fatigue seams to be use as a double edge sword, that you need to know how to not over do it but do it enough to drive the adaptation. And that stimulus under depletion enhances the adaptation.
And that seams to be the case of Ingebritsen to be as fatigue as posible but not go over the edge and repeat for long periods of time (not tryieng to focus on the injuries), and has worken very well for him and brothers.
How does some one can distinguish the fatigue from the on that will get you stronger from the one that will get you in a hole.
The CTL is one metric many here will say but that in mi case havent relate at all from how i run or training is going and seams to just reward volume