Overtime games in the NBA are fun to watch, but not as much fun to play in. Basketball is a grueling, demanding sport on the body, requiring athletes to run up and down the court for 30-40 minutes. That’s why you can find hockey and baseball players performing into their late 30s and 40s at a high level, but this almost never happens in the NBA. Like football, the sport wears down a body fast. In football it’s from all the physical pounding, and basketball it’s the toll taken on the legs and heart, constantly running.