摘要:Problem statement. It is suggested that needs were positive predictors of autonomous motivation, which in turn was a positive predictor of sportsmanship attitude and a negative predictor of anti-social moral attitudes in sport. It is claimed also that the relationship between combat sports and martial arts, self-determined motivation and moral attitudes has not yet been established. Purpose. This study was designed to evaluate the effects of practising martial arts and combat sports on self-determined motivation, ethical attitudes, and aggression.Material & methods. There were 219 respondents. The diagnostic poll method with the questionnaire technique served to fulfil the assumed aims. Standardized research tools were applied. Behavioural regulation was measured with the Polish adaptation of the Sport Motivation Scale-6 (SMS-6) (Blecharzet al. 2015). To assess the level of general aggression index, the Buss and Perry Aggression Questionnaire (BPAQ) in the Polish adaptation by Siekierka (2005) was applied. Ethical attitudes were evaluated with the Ethics Questionnaire by Wojciszke and Baryła (2000). Results. The analysis of the model revealed a complete effect c at the statistical trend level of the type of training (combat sports/martial arts) at the level of the general aggression index (R2 = 2.80; p = 0.08). The positive value of the coefficient c means that combat sports practitioners reached a higher level of aggression than martial arts competitors. The obtained model was well matched to the data (p< 0.001) and explained 11% of the variance of the dependent variable. The model containing paths b1, b2, and c', with the level of the general aggression index as a dependent variable, was well matched to the data (p< 0.001) and explained more than half of the variance of the dependent variable (52%). A significant negative effect of RAI on the level of the general aggression index was observed (R2 = –13.87; p< 0.001). Conclusions. Martial arts are associated with more autonomous forms of motivation than combat sports and therefore can foster greater control of aggression and higher ethical sensitivity.