For any of you that are thinking of running 100 miles any time soon, fear not- the damage is probably not permanent. Schütz and his team blieve normal brain function will return within eight months.
“The reversibility of the changes at follow-up supports the finding that [gray matter] changes in chronic diseases like chronic pain are… functional and reversible” he says.
“Accordingly, relevant and persisting long-term effects on the brain’s integrity in ultramarathon runners are less likely to occur.”
Even so, to be on the safe side, we’re going to stick with the 10Ks…