"These athletes feel they owe it to their donors to do the best they can."

This is the kind of injury that produces the pain and swelling some athletes feel after exercise.

Training others can make pro athletes feel that they still have a pulpit.

No athlete can feel satisfied by a performance achieved with the aid of drugs; natural success lasts much longer.

People are driven by a desire to achieve or a need to avoid failure; most elite athletes feel a mix of both things.

"You have to make the athlete feel comfortable that he can work with the institution to get objective information," Johnson said.

"The issue is whether athletes feel they're being pressured into doing it," Otton said.

Initially, athletes can feel a deep sense of loss or a void in their lives.

Other athletes have felt an entire region behind them.

He is 30 years old, a professional athlete and he felt cold one minute, very hot the next.