There has been a lot made of fighters getting slower when they got too muscular. When Vitor was at his absolute fastest punching speed I'd say it was his first few UFC appearances when he was 19 and 20 years old.. The first time he was noticeably significantly slower was when he fought Randy Couture the first time. He was able to mount one of his amazing flurries of punching speed in that fight. There is a lot of speculation Belfort may have been on the gear vs. Couture in their first fight. So in his first few fights, the ones when he was 19 and 20 years old, was he probably natural?