Introduction: The second to fourth digit length ratio (2D:4D), a proxy of prenatal testosterone exposure, has been linked to a wide variety of sexually differentiated dispositions and behaviors. In conclusion, this study sought to investigate the association of 2D:4D with risk taking in men and women bodybuilders.
Methodology: In this descriptive-correlation study, 50 male bodybuilder and 50 female bodybuilder, were evaluated using available method. To carry out research, a combination of IMP-SS questionnaire that included two questionnaires impulsivity, sensation seeking and Zuckerman (1994) has been used.to measure the length of the fingers as well as digital imaging, was used on the dial. And to analyze data was used Pearson correlation coefficient
Results: Between 2D:4D and risk-taking variables in this study, there was a significant negative correlation (p<0.05). The results showed that between 2D: 4D and subscales of experience seeking, disinhibition and sensation seeking there was a significant negative correlation.
Discussion: It is thought that the relationship between 2D: 4D with risk is due to the influence of testosterone. High levels of testosterone increases length of the fourth finger and it louder in comparison to the second finger (Lower digit ratio). Thus leads to behaviors such as competition and risk-taking.