The FastDay Forum

A 12 week study, comparing no exercise, a 10 minute workout that involved 3x20s of intense exercise, and 45 min of plodding along.
http://well.blogs.nytimes.com/2016/04/2 ... ref=health
http://journals.plos.org/plosone/articl ... ne.0154075

Interesting article. That mitochondrial increase occurs early fits within what evolution would require. If you don't adapt quickly enough you become dinner.

What I'd like to have seen is a comparson of hit vs moderate intensity times to exhaustion. It would seem that moderate intensity exercise for longer time would relate to longer times to exhaustion exceeding what a HIT based response could generate. If you can outrun the tiger in a few minutes (with HIT) then running another xx miles (with MICT) become unnecessary.