Correlation Analysis between the Ratios of Second Fingers to Fourth Fingers and Athletic Performance in Primary School Students

There might be relationship between the ratio (2D:4D) of the 2nd finger length (2D) and the 4th finger length (4D) and the athletic performance. Method: Taken the athletic performance and measured finger length from pupils were enrolled from the Affiliation Primary School of South China Normal University. Aim: probe into relationship between the athletic performance and 2D:4D in domestic pupils. Result and conclusion: The negative relation between right hand 2D:4D and athletic performance, and lower 2D:4D in boy than girl. Keywords—2D:4D, athletic performance, sex The second human finger length (second finger length, 2D) and the length of the fourth finger (fourth finger length, 4D) ratio (digit ratio of 2D and 4D, 2D: 4D) and exercise capacity correlated. Many studies have shown that 2D: 4D has been established before birth, the mother's uterine concentrations of testosterone and testosterone concentrations of adult negatively correlated Testosterone concentration will affect the development of the right hemisphere visual and spatial ability, thus affecting exercise capacity; 2D: 4D differences in regional and ethnic. There is a substantial research internationally, but the domestic 2D: 4D research and athletic ability is still basically a blank. This study investigated pupils 2D: 4D, explore their differences and sports scores and sex. I. RESEARCH CONTENTS AND METHODS. A. Study 382 pupils from the Affiliation Primary School of South China Normal University, are Han Chinese students, exclude those bad pictures and photos see the fold means that there were 8 pupils, total effective capacity of 374 pupils, accounting for 97.9% efficiency number. Fourth grade total of 119 pupils , fifth grade a total of 141 pupils, sixth grade total of 114 pupils; Its 32.5% of the total number of valid, respectively, 37%, 30.5%. Get for students final examination sports scores through all grades of PE teachers, and sports scores into the sports scores failure (less than 60 minutes), a qualified sports scores (60-74 points), good sports scores (75-89 points), sports scores excellent (90 points or more) of these four grades. B. Data Taken: Student’s fingers naturally straight, fingers closer, his hands attached to 3mm thick glass, with Kodak 600 digital camera, the other side of the glass photographed the entire palm. After retrieving a photo on your computer using Photoshop amount of arm length, close to the palm fingers from the crease to the top of the finger, measure out the righthand man of 2D and 4D length [1]. 20 Photos repeated random sampling volume 2 times, twice before and after the data are highly correlated (right r = 0.99, left r = 0.98). Calculated by SPSS 2D: 4D; right hand 2D: 4D, left hand 2D: 4D, left and right hand 2D: 4D average. C. Statistical Data Analysis: Using SPSS 12.0 statistical software package for the measured data for statistical analysis, the data frequency analysis, One-Way ANOVA, Bivariate. Data Results were expressed as mean ± standard deviation (X ± S) to represent significance level of P <0.05, very significant level of P <0.01. Since the large sample data, so the entire process of analysis, the data are processed in contingency to calculate more accurate results.