Originally Posted by
cjurakpt
if you consider why HIIT "works", it seems to have to do with the fact that it requires the physiology to work in a non-habituating capacity; in other words, if you do a 3 mile run, assuming you are capable of it, after a certain point, the cardiorespiratory system "gets" what is happening, and acclimates; once it does this, in a way, the system has become more efficient, it can expend less energy to achieve the desired outcome - it's kinda like the difference in gas use accelerating up to 60 and then maintianing it at 60; by doing HIIT, you are never allowing for habituation, you are "forcing" the system to "improvise" each time; by analogy, when doing neuromuscular re-ed work with clients, I subjectively find that by keeping the number of reps low (3-5 for kids, 8-12 for adults), whatever we are doing doesn't loose it's edge, so to speak: it maintains a certain degree of "newness", which is what forces the system to actively learn each time as opposed to relying on some sort of "recall" (assuming the task is neither too hard or too easy to begin with, of course) - once the system understands what it is doing, it can start to use other compensatory patterns to cut corners; in a way, this approach can be tiring because of the degree of mental focus required, and as such it's a good way to simulate the reality of unpredictable stressors that one may encounter in the "real world"
Absolutely correct, though most people tend to "pace" their HIIT.
Everyone talks about the Tabata protocol because its the one that got all those awesome results, yet very few people do HIIT in that method.
Psalms 144:1
Praise be my Lord my Rock,
He trains my hands for war, my fingers for battle !