The objective of this study was to identify the causality among the personality traits, exercise commitment and exercise addiction of club marathon runners. Personality traits, exercise commitment, exercise addiction questionnaires were distributed to 241 club marathon runners. Reliability, validity, descriptive statistics, correlation analysis conducted and exploratory factor analysis, confirmatory factor analysis were conducted. Further, structure equation modeling was performed to validate the hypothesized causal model. As a result of this study firstly the sub factors of personal traits in club marathon runners positively influenced exercise commitment, exercise addiction. secondly, the exercise commitment factors of club marathon runners positively influenced exercise addiction. Finally, as a result of causal model verification, it was shown that there was a multidimensional causality among the personal traits, exercise commitment, exercise addiction.