I noticed in the Heavyweight division Boxers who started boxing in their early 20's still have a good chance of being a champion where Boxers who started in their mid 20's (24-26) have little chance why is that when there is a small difference in years ?
2 obvious reasons. 1.They have more years to learn their craft. 2.By the time a fighter who starts in his mid 20s starts to get goo, they're already in their 30s and in physical decline.
When you are young your muscle memory is much better, you learn faster etc. For example in classical music to develop world class technique you need to start practising at the age of 5-7. 9 is already considered too old. Look at Loma, Floyd and Canelo, they all started boxing pretty early.