A research found out in Oxford which Dr. Andrew stated,
"We found that rats, when switched to a high-fat diet from their standard low-fat feed, showed a surprisingly quick reduction in their physical performance,".
In this research the high-fat diets as such as those who lives in Western nations are highly exposed to be in a long term destruction which can lead to troubles such as obesity. So just limit your eating marathon ok, just in case. So keep exercising ok.