Why do some fighters' primes differ?

How does it differ from person to person? Like Floyd is 32 and he looked quicker and sharp as ever and Pernell was done by that time? Because humans differ from person to person? Just a guess.

How does it differ from person to person? Like Floyd is 32 and he looked quicker and sharp as ever and Pernell was done by that time? pernell was doing drugs and living badly, while floyd doesn't even touch alcohol. also sweet p took tougher fights and actually had wars. sweet p is a complete boxer, while floyd is almost completely defensive.

Fighters have different primes because people are different. Why would fighters primes be alike when there ain't two completly alike persons on this planet?

How does it differ from person to person? Like Floyd is 32 and he looked quicker and sharp as ever and Pernell was done by that time? Whitaker was on drugs and probably took more punishment in his career by the time he reached 32 than Mayweather did

Whitaker made his debut at 20 and was fighting world class opposition on a consistent basis right up until he started slipping going into the Rivera fights. After he unconvincingly beat Rivera he gave Oscar a close bout (which I scored for Sweet Pea) and then drug problems, poor training regime and inactivity finished him off completely. Floyd's been training consistently his entire career, his body is clean and he hasn't met anywhere near the same calibre of opposition that Whitaker did. Basically, fighters primes differ. Not sure why but it's the same in every sport, everybody peeks at different times.