I've been thinking for some time on the whole LISS vs HIIT for optimal fat loss thing for a while now so I decided to share my thoughts.
Typically in these threads people will always say "Oh, you should do HIIT, do you want to look like a sprinter or a marathon runner?" And then they'll post this picture
as their reasoning. I don't think anyone should think like this. Why? For starters, they used one of the worse looking marathon runners and one of the best looking sprinters to use as a comparison. Take Dean Karnazes for example, who once ran 50 marathons, in 50 states, in 50 days (yes serious) (google it)
Or David Goggins, another ultra marathon runner
Both these men compete in 100 mile + races yet they don't look as bad as the Finland guy. Also, not ALL sprinters are as jacked as that dude, either.
Some things to consider is that a marathon runner typically will not lift weights as it'd only increase their bulk and make them slower whereas a sprinter does, and often. Steroid use could also come into play as it'd make them bigger, stronger, faster, whereas it'd have no use to a marathon runner.
Another typical argument that HIIT fans push is that "Hey, people have been doing LISS for so long yet they're still fat." This comment is so retarded I don't even want to begin discussing it but for the sake of this topic, I will. Seven out of ten Americans don't exercise and the ones that do and stick to it, almost always see results. The comment of oh you always see those fat people on the treadmill doing LISS or whatever, are unfounded. That individual could have been fatter and already lost weight doing LISS or will lose the weight in the future. Do HIIT advocates remember the people on the cardio machines in such vivid detail that they can tell they aren't progressing month after month? I doubt it.
Personally, I feel as if a mixture of both will get most people where they want to be. Doing HIIT will improve your LISS sessions and vice versa. What are your thoughts?
Thread: LISS vs HIIT (serious)