Personal and Psychosocial Predictors in the Use of Prohibited Substances in Sport

There is a large number of scientific evidence on individual demographic and psychosocial predictors,correlated with drug use in performance sport.Using the method of metaanalysis, in this study we propose to determine: a)the size of the psychological effect (attitudes) and socio-cultura factors (social norms), as well as demographic factors (age,sex) that may explain the presence of consumption of prohibited substances among performance athletes; b)the delimitation of variables which may explain the size of these effects; c)correlation of the theory of planned behavior with the use of prohibited substances in performance sport. The results of the study revealed that the presence of a positive attitude towards the drug positively correlates with the intention to use the drug.The perceived self-efficiency in procuring these substances also correlates negatively with the intention of consumption.