"Pretty sure he hasn't tested positive for any performance enhancing drug."

Apparently, the most consistent performance enhancing drug is still money.

The next part of the documentary deals with performance enhancing drugs.

By performing such test future failures can be prevented and performance enhanced.

It has also been misused as a performance enhancing drug by athletes and others.

The use of performance enhancing drugs has also been found in other levels of football, including college level, and high school.

Selig has been called to Congress several times to testify on performance enhancing drug use.

She stated that the presence of performance enhancing drug use had made a professional track career less appealing to her.

The sport package is extended to include the 740iL but without the same performance enhancing features as the 740i receives.

His sport is arguably the most rampant with chronic performance enhancing drug use.