Firstly fat and cholesterol consumed within a diet does not translate to colesterol in the blood. High fat diets have been proven to increase good colesterols, decrease bad colesterols and produced dramatic reductions in triglicerides. This research has lead scientists to believe that colesterols is more closely related to animal fats produced by the body (related to liver fat, which is produced by anabolic processes caused during insulin spikes).
High levels of dietry fat cause adaptations to fat burning. An unexpected level of endurance ability can be obtained purely from a high fat diet without training. Coupled with training a high fat diet can produce dramatic endurance inmprovements.
I've included some links from the eating academy, but there are dozens of good sources of imformation available. Check through the links and run a google search.
How did we come to believe saturated fat and cholesterol are bad for us? « The Eating Academy | Peter Attia, M.D. The Eating Academy | Peter Attia, M.D.
How can I lose weight? « The Eating Academy | Peter Attia, M.D. The Eating Academy | Peter Attia, M.D.