Any insights on benefit (if any) on IF (16hour fast) preceding HIIT versus Zone 2 aerobic training session? Would it help with fat oxidation for well trained athletes while in season or would it be better kept during off season base training?
Follow up to initial question: Any additional benefit for already fat adapted athletes versus non fat adapted athletes?
Definitely. Amplifies AMPk signaling => increased mitochondrial biogenesis (Yeo et al., 2008; 2010).
In theory yes. Mix it up.
Already fat adapted athletes will simply tolerate it better (psychologically adapted) but both benefit