I guess part of my confusion exists with what I thought was included in the term ‘intensive tempo’. I thought that not only was there a difference in intensity (Max V >95%, SE > 90%, IT < 90%) I thought that while Max V and SE tended to avoid much of a lactic component by using complete to nearly complete recovery, IT tended to introduce a lactic component by NOT using complete recovery. Part of my confusion concerns whether or not a 100/200 sprinter needs much of a lactic component in their training. If we’re just talking about reduced intensities (i.e., 6 x 150 @ 85% w/ full recovery) I understand and would consider this low intensity SE, but if not using full recovery and doing true (my understanding of the definition) IT with incomplete recovery and a lactic component, I guess I’m still confused.