I call it out 5 wrote:
'Supra T' ?? What kind of pace and lactate level would that be?
I was euphemistically referring to basically anything above about 10k race pace. I.e., VO2max intervals, strides, etc.
Really hard intervals with longer rest periods like middle distance runners do would fall in the same bucket, but unlike the above aren't part of the typical hobbyjoggers program.