Influence of digit ratio (2D:4D) on reaction time and athletic sprint performance: A short term pilot study
Journal Title: Medpulse International Journal of Physiology - Year 2018, Vol 5, Issue 2
Abstract
Digit Ratio is the ratio between the lengths of index finger to that of Ring finger. Recent evidence suggests that the relative length of the 2nd to 4th finger (2D: 4D ratio) is a biomarker for prenatal exposure to testosterone. In our study, we investigated the influence of digit ratio on reaction time and performance of athletes in short duration aggressive sport events like 100 meters sprint. This observational study was conducted on 38 healthy athletes, 20 female and 18 male. Athletes practicing since one month are only allowed to participate in our study. The digit length was measured by using Digital Vernier calliper. The reaction time of the participants was calculated by using android mobile app named “Reaction Time”. The results showed that the digit ratio of left hand done with Ventral method or by Dorsal method was significantly better than the right hand measurements (p<0.05). The outcome parameter of performance was analysed by Logistic regression and it showed that there is no significant correlation or influence of the factors like gender, digit ratio, and reaction time difference on the performance. The same results were obtained when the male and female performers were analysed separately by Logistic regression on the same parameters like digit ratio and reaction time difference. The “pearsons” correlation between sprint time and digit ratio of left hand, measured by “Dorsal” method showed statistically significant (p < 0.05).correlation coefficient (R = 0.32). The correlation coefficient (R = 0.32) is showing moderate level of correlation between these two factors. The linear regression between digit ratio and sprint shows that there is a positive correlation between these two factors. The overall study shows that there is a moderate correlation between performance (sprint time) and digit ratio. Key Words: Digit Ratio; 2D:4D Ratio; Vernier Caliper; Reaction Time; Testosterone; Athletes.
Authors and Affiliations
M K Tambe, A V Turankar, S Lingawar, N B Dhokane, N P Pophali, P M Kherde, Vinay Bajaj
Keywords
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