Yet every athlete these days knows the importance of "being in the moment."

Even the paid athletes know it's just a job for them.

We know better than any other athletes have ever known how hard the other has worked.

Professional athletes have always known its value for fitness training.

"The other athletes knew I was making a statement," he said.

The athlete runs the marathon and knows the end of the race is near.

"I remember driving and thinking about how they say athletes never know when to get out," she said.

And only the athletes know if a little bit comes from within.

Sure, many athletes, especially young ones, did not know they were being drugged.

So many athletes know what it feels like to be a rock star now.