Influence of 2D:4D ratio on fitness parameters and accumulated training load in elite youth footballer

The purpose of the study was : (1) to analyze the influence of anthropometric and 2D:4D ratio on variations of accumulated training load (ATL) and fitness parameters: maximal oxygen uptake (V̇O2max), countermovement jump (CMJ), isometric muscular strength of quadriceps (ISQ) and hamstring (ISH); along three stages of evaluation of footballers based on playing positions; (2) to analyze the correlations between 2D:4D ratio and mentioned parameters; and (3) to investigate if variance in fitness levels and ATL can explain the 2D:4D ratio.