Russia and Kenya take the podium in the athletics doping contest | The Economist
Five performance-enhancing products that are fair game in improving race times - Canadian Running Magazine
Kenya's Matthews Kisorio doped because he 'wasn't the only one' | Athletics | The Guardian
The amateur's complete guide to blood doping
5 Supplements Clinically Proven To Increase Endurance In Athletes
Rio Olympics Doping Facts: How Performance-Enhancing Drugs Work And The Risks
Some Banned Olympic Doping Drugs Have Actual Medical Uses
10 Performance-enhancing Drugs That Aren't Steroids | HowStuffWorks
Doping in Endurance Sports - Adventure Medic
10 Performance-enhancing Drugs That Aren't Steroids | HowStuffWorks
Performance Enhancing Hormone Doping in Sport - Endotext - NCBI Bookshelf
10 Performance-enhancing Drugs That Aren't Steroids | HowStuffWorks
Sport is still rife with doping | The Economist
Blood Doping 101 - CyclingTips
10 Performance-enhancing Drugs That Aren't Steroids | HowStuffWorks
Performance Enhancing Hormone Doping in Sport - Endotext - NCBI Bookshelf
10 Performance-enhancing Drugs That Aren't Steroids | HowStuffWorks
The science of doping and how cheating athletes pass drug tests
Drug improves endurance without need for exercise
10 Performance-enhancing Drugs That Aren't Steroids | HowStuffWorks
MH's 6 best (and legal) performance-enhancing tips
Drugs in sport - Curious
10 Performance-enhancing Drugs That Aren't Steroids | HowStuffWorks
10 Performance-enhancing Drugs That Aren't Steroids | HowStuffWorks
Doping in Endurance Sports - Adventure Medic
Anabolic Steroids: Uses, Side Effects, and Alternatives
The Top Athletes Looking for an Edge and the Scientists Trying to Stop Them | Science | Smithsonian Magazine
What does 'doping' mean in athletics and why do athletes take banned substances? - BBC News
