Recent years of general life well-being have significantly affected for the perception of free time by rich societies. In the second half of the 20th century, active recreation and caring about health weren't be the main pillar necessary to maintain physical and mental health. Sport was treated only as work, and only professionals athletes did it. In the 21st century, the situation changed radically. Some people started saying that active recreation allow maintain mental and physical balance, which contributes to more effective work in other aspects of life. Interest in sport in free time started increase, what contributed to the emergence of new industries, which are sport services. Organizing mass running events, opening new fitness clubs and coaching services have become a job for many former professional athletes. With the growing popularity of amateur sport, it started to be a part of the professional sport, and eventually became a part of it. Health improvement has stopped be the basic motivational factor of an amateur athlete, it has been replaced by the desire to achieve good sports results, which is associated with increased interest in prohibited substances in this environment. Therefore, main goal of this article is to check the knowledge of doping issues in sport amateur enviroment and to verify commonness of doping in mass running events. Another important aspect is a anti-doping secure in mass running events. Correct functioning of anti-doping prevention during competitions is necessary to expand knowledge about doping in general society.