Androstenedione is a steroid hormone that can be broken down into testosterone. Testosterone is naturally made by the bodies of males and, in much smaller amounts, females. When athletes take anabolic steroids, these drugs stimulate the muscle tissue in their bodies to grow larger and stronger, exaggerating the effects of testosterone on the body. However, blood doping works in a much different way. In the past, a liter of blood would be removed from an athlete's system and then frozen and stored for several weeks. A day or two before a big race, the stored blood would be re-injected into the athlete's system - creating extra red blood cells. These extra red blood cells would carry more oxygen to the muscles - giving the athlete an advantage over the other racers who don't use blood doping. Athletes don't re-inject blood very much anymore. Instead, cheating athletes will inject genetically engineered drugs which cause the body to create extra red blood cells. The most common type of blood doping chemical used is called EPO -
Androstenedione is a steroid hormone that can be broken down into testosterone. Testosterone is naturally made by the bodies of males and, in much smaller amounts, females. When athletes take anabolic steroids, these drugs stimulate the muscle tissue in their bodies to grow larger and stronger, exaggerating the effects of testosterone on the body. However, blood doping works in a much different way. In the past, a liter of blood would be removed from an athlete's system and then frozen and stored for several weeks. A day or two before a big race, the stored blood would be re-injected into the athlete's system - creating extra red blood cells. These extra red blood cells would carry more oxygen to the muscles - giving the athlete an advantage over the other racers who don't use blood doping. Athletes don't re-inject blood very much anymore. Instead, cheating athletes will inject genetically engineered drugs which cause the body to create extra red blood cells. The most common type of blood doping chemical used is called EPO -