The TU Delft Sports Engineering Institute organize an course about special topics in sports engineering. One of these lectures in this course was about the development and ethics in sport. This lecture gave insight in the impact of the use of doping in sports in terms of prestation and the different options of doping. This lecture outlined five different classes of doping. The first is the pharmaceutical doping. This is the kind of doping we think of when we talk about doping, the usage of forbidden medication for sport enhancement. The second one is gene doping. The last three kinds of doping opened a whole new world of doping. The first is material doping. By making the materials better, you can get an unfair benefit. An example is the clap skate. The first time the clap skates were used, only the Dutch team used them, what made them win every medal. Is that fair. The next is training doping. When you have the opportunity to train in a good team, this will help you to go to a higher level. Is that fair? The last one societal doping. When you found sponsors, or the government is willing to pay your salary, you can use all your time for training and you do not have to worry about money. Other sporters may not get this opportunity. Is that fair? How far should we go in the development of sports at all?