CT, I know you have mentioned in the past that a workout should NOT be a "checklist" of sets/reps/exercises to do, but should accomplish a specifc goal (stimulate without exceeding your capacity to recover).
I have to admit that because of the way the layers are set up (Ramp, 3 clusters, 3 HDL for example) I often have been guilty of doing all the sets/reps even if I am feeling more and more run down or performance is dropping dramatically as the sets go on.
I have noticed that if I finish the session even when I am getting more and more "drained" towards the end, the workout the following day(s) suffers.
Would it be wise to cut the workout short if I start to feel myself tip into that fatigued state? It doesn't happen often, but I think I'm finally learning my body well enough to know when it is happening. Seems kind of like an "on the fly deload" which, while a single training session might be cut short, would allow you to train for longer periods of time without accumulating unnecessary and detrimental fatigue.