Competition is most noticeable in sports. Competition in sports is hard. Athletes must train for hours every day. Sometimes, they seek other ways to increase their performance and turn to drugs and other chemical substances. As the rate of drug use increase, sports organization try to prevent their use. They do this by testing the athletes 'blood. If they find signs of drug use, they can ban athletes from future sports events. Sports organizations explain that they have to do this for two reasons. First, they say that drugs deliver an unfair advantage. Second, they mention that the use of drugs is bad for athletes 'health.