My dad was a Coach and i grew up on basketball and football fields. I know what these kids are going through. But i also know the real world outside of sports and i can tell you there are much tougher things to do than run up and down a court . If you have someone injured that is different. Are they tired at the end of games absolutely but i dont believe you take your foot off the gas . Once you lose that competitive edge it can be hard to get it back. Look at the Colts and tell me they were clicking on all cylinders in the playoffs.