The main purpose of this study was to determine the self-estimated levels of knowledge about doping for a group of strength training young adults, and also to get an idea of their attitudes regarding the subject. A part of the purpose was also to investigate the potential associations between knowledge and attitude. Method: To collect information a questionnaire was constructed that was inspired by a similar study and in consultation with the tutor. Questions regarding background, doping and training experiences together with self-esteemed attitudes and knowledge about doping were included. Questionnaires were handed out at gym facilities in central Sweden, and were answered by men and women ages 18 to 35 years. The results are represented by completed questionnaires from 36 subjects. The form of this study was quantitative cross-sectional. Materials used, apart from the questionnaires, were mainly literature and scientific articles. Besides this, health related reports were used. The Main Results shows that the majority of respondents stated that they had quite a bit of knowledge on doping. Despite this, most of the respondents stated their knowledge about doping effects and side effects as minimal. It is worth mentioning that none of the respondents felt they had a lot of knowledge on the subject. The knowledge level was considered to be satisfactory by about 44 % response rate among all respondents. Differences existed between sexes as the majority of the women felt they had little knowledge about the subject and wanted to learn more. Of note was that friends and internet accounted for the bulk of sources of knowledge, followed by the school and media. Regarding attitudes, the majority of respondents refrained from most allegations about doping. That doping is a growing problem in society and that it is up to each individual to decide whether to use doping substances, however, most subjects agreed positively to. Thus, there was a prevailing positive attitude towards individual freedom of choice as regards the use of doping. There were significant differences between different age groups which showed that younger had a more positive attitude about doping than older. Conclusions: Considering the lack of knowledge among the respondents and the larger positive approach among the younger group, schools should prioritize the doping topic further. This is particularly important considering internet and friends as the greatest sources of information which could have a negative outcome. Results from the questionnaires also showed a generally positive attitude towards the individual's free choice. The liberal vision has increased in the country in recent years and this area should preferably be studied more deeply in order to avoid danger to the community. How well the results reflect the reality cannot be determined considering shortfall, a relatively low number of participants and risk of socially desirable responses.