I expected this to be a fluff piece about exercise and learning, but it was in fact rather interesting.

It should be noted that while increased "glycogen supercompensation" in the brain correlates with the much-hyped exercise-induced-cognition-enhancement (aka running makes you smarter/healthier/happier) the author's don't provide any behavioral or cognitive tests. They acknowledge this, and since it wasn't part of their study they just offer the correlation as an interesting hypothesis.

I imagine they'll be testing cognition/behavior in their next paper.

The articles they are referencing is:

http://www.ncbi.nlm.nih.gov/pubmed/21521757

http://www.ncbi.nlm.nih.gov/pubmed/22063629