The main capacity of endurance performance is cardiac capacity, which is genetically encoded in large

quantities. It can increase cardiac efficiency by training for a long time, but the amount of this increase is limited by genetic makeup. Hundreds of gene variables related to sportive performance have been identified and the rapid development of genetic therapy or treatment has gradually increased the possibility of gene doping. EPO gene, which is among the genes that affect athletic performance positively affects aerobic capacity and increases long-term endurance. EPO gene, which is among the genes that affect athletic performance positively affects aerobic capacity and increases long-term endurance capability. EPO or blood doping is used as an illegal method to increase the number of erythrocyte cells, especially in long-term efforts to increase endurance performance (marathon, cycling, triathlon, etc.). The chances of gene doping to occur

and to have a significant impact on the outcomes of the competition are very low for now. Athletes should be aware of not only the side effects that doping may have on their health, but also how it might affect their lives

later on, and it is strongly recommended that they judge and use these situations accordingly.