not trying to dunk every time he takes it to the rack might prolong his career as a top notch contributor. There is a ling list of guys who start to break down after 30 because they relied to much on athletic ability ( see D Wade& Vince Carter)
I don't really think you can include either one of those players in that example. Vince has been playing in the league for what seems like 20 years and still getting decent contracts. Wade is still a great player. He just happens to have some knee problems but he's a starter on any team he goes too. He might not be able to single handedly win a championship any more....but when he did he played above the rim. Any player that's 32 or 33 loses a couple inches from their vert compared to when they were younger.