1: fedor physique look exactly the same when he fought cro cop,werdum,hendo and Bigfoot Vs werdum Vs cro cop In the Bigfoot and hendo fight,he actually look better than ever before. 2 myth: Most fedor fan claim that athlete usually decline between 8-10 years but there's zero scientific proof to back up that ridiculous claim.and fedor was winning and taking not much damage in those ten years.in fact it should boost his mental strength. 3: age and decline: The only legit explanation to fedor decline is age but fedor was only 33/34 when he fought Bigfoot silva. According to multiple studies ,strength peak around 25 years of age,plateaus through 35-40 years of age.after age 40 can be explained by the loss in the powerful type 2 fiber motor units with subsequent muscle atrophy and a loss in muscle power. http://www.sportsci.org/encyc/agingex/agingex.html#THE PHENOMENON OF https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3928819/ In short: there's zero proof and reason to believe that fedor was out of his prime when he fought bigfoot,werdum and hendo.