Let me tell you why I don’t fully buy the argument of “Well, just look at sprinters vs long distance runners.”
I had plenty of friends in track and do know that most sprinters tend to have better muscularity, however, I have not seen a ‘study’ where nutrition was taken into account.
I think most of us would agree that ‘a calorie is not a calorie.’ That said, I am curious if the long distance runner and sprinter had the same meal plan, and if the sprinter LOOKED better, maybe the diet was better suited for the sprinter’s physical activity, and better for building/preserving LBM?
If that is the case, then perhaps the long distance runner would need a different diet, different caloric intake and/or macronutrient breakdown.
It’s much more complex than to simply look at GH output and energy expenditure. There have been zero correlations with nutritional programs when comparing the anabolic/catabolic affects of steady state cardio vs HIIT.
Well, all you need to do is train the way I suggested: do many hours per week of quite hard aerobic work.
Report back when you’re disgusted with how much harder it now is to get really lean and how much it’s interfered with lean mass.
Or if you think what I’ve written is not right, then hypothetically your outcome will be the opposite and you can report that.
In the meantime, maybe consider this:
Assume the body is fairly good at optimizing itself to what experiences teaches it is needed.
Now, if experience has been that frequently long hard hours of aerobic work are required, and this requires fat liberated from fat cells at a high rate for fuel, would the body intelligently drop fat stores quite low?
Or if experience is that the body frequently has need for maximal acceleration and maximum speed, and never needs a high rate of fatty acid supply for long periods of time, would the body intelligently hang onto substantial excess fat weight?
Isn’t it conceivable anyway that the body might optimize itself to the experienced needs? And it’s optimal, in terms of being able to meet the demands, for someone doing long hours of hard aerobic work to have plenty of capacity to supply fatty acids to the bloodstream?
Or just do the experiment. Countless people already have (usually inadvertently, except when deliberately when first learning of HIIT, and then doing the comparison in the opposite direction) and so the results are generally known already, but there’s nothing like doubters finding out for themselves via personal experience.