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Table 2 Associations between 2D:4D, fitness variables, and accumulated training load

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

Variable β0 β1 β2 β3 β4 β5 β6 β7 β8 β9 β10 β11 β12 β13 β14 β15 β16 β17 β18 β19 β20 β21 β22 β23 β24
LF-2D (β0) 1                         
LF-4D (β1) 0.89 1                        
LF-2D:4D (β2) 0.29 0.02 1                       
RF-2D (β3) 0.98 0.86 0.34 1                      
RF-4D (β4) 0.88 0.99 0.03 0.85 1                     
RF-2D:4D (β5) 0.18 0.03 0.94 0.26 0.00 1                    
Dif-R:L (β6)  − 0.17  − 0.04  − 0.17  − 0.07  − 0.10 0.14 1                   
ISQ1 (β7)  − 0.32 0.01  − 0.80  − 0.40 0.00  − 0.78 0.03 1                  
ISQ2 (β8)  − 0.32  − 0.02  − 0.81  − 0.40  − 0.04  − 0.78 0.03 0.99 1                 
ISQ3 (β9)  − 0.32 0.06  − 0.78  − 0.39 0.05  − 0.75 0.04 0.96 0.94 1                
ISH1 (β10) 0.00 0.22  − 0.63  − 0.06 0.22  − 0.62  − 0.04 0.76 0.74 0.73 1               
ISH2 (β11)  − 0.30 0.00  − 0.64  − 0.33 0.00  − 0.61 0.15 0.75 0.78 0.74 0.71 1              
ISH3 (β12)  − 0.01 0.29  − 0.41  − 0.01 0.30  − 0.43 0.13 0.58 0.55 0.67 0.80 0.71 1             
H:Q1 (β13) 0.30 0.11 0.60 0.36 0.10 0.58 0.04  − 0.73  − 0.72  − 0.73  − 0.07  − 0.39 0.03 1            
H:Q2 (β14) 0.20  − 0.03 0.62 0.31  − 0.05 0.65 0.05  − 0.78  − 0.75  − 0.77  − 0.32  − 0.22  − 0.03 0.81 1           
H:Q3 (β15) 0.32 0.15 0.53 0.42 0.14 0.48 0.06  − 0.58  − 0.56  − 0.59 0.02  − 0.11 0.32 0.83 0.87 1          
VO2max1(β16)  − 0.24  − 0.24  − 0.55  − 0.30  − 0.26  − 0.50 0.20 0.59 0.55 0.54 0.38 0.33 0.16  − 0.48  − 0.54  − 0.46 1         
VO2max2(β17)  − 0.22  − 0.13  − 0.55  − 0.25  − 0.16  − 0.46 0.36 0.62 0.59 0.62 0.44 0.48 0.34  − 0.45  − 0.44  − 0.37 0.93 1        
VO2max3(β18)  − 0.30  − 0.20  − 0.58  − 0.36  − 0.24  − 0.49 0.26 0.58 0.55 0.58 0.37 0.41 0.23  − 0.47  − 0.48  − 0.49 0.93 0.93 1       
CMJ1 (β19) 0.26 0.34  − 0.26 0.16 0.34  − 0.30  − 0.10 0.44 0.42 0.43 0.18 0.19 0.14  − 0.49  − 0.52  − 0.44 0.33 0.28 0.36 1      
CMJ2 (β20) 0.41 0.49  − 0.35 0.31 0.49  − 0.40  − 0.14 0.47 0.45 0.47 0.29 0.26 0.33  − 0.41  − 0.43  − 0.26 0.39 0.41 0.42 0.86 1     
CMJ3 (β21) 0.34 0.29  − 0.23 0.27 0.36  − 0.36  − 0.24 0.31 0.29 0.33 0.14 0.15 0.17  − 0.33  − 0.39  − 0.31 0.31 0.29 0.31 0.78 0.76 1    
EarS ATL (β22)  − 0.12  − 0.21 0.17  − 0.15  − 0.24 0.27 0.05  − 0.12  − 0.16  − 0.20  − 0.44  − 0.04  − 0.47  − 0.11 0.00  − 0.19  − 0.09 0.00  − 0.06  − 0.02  − 0.12  − 0.16 1   
MidS ATL (β23)  − 0.16  − 0.28 0.06  − 0.19  − 0.32 0.12 0.03 0.03 0.03 0.00  − 0.25 0.03  − 0.29  − 0.26  − 0.09  − 0.24 0.11 0.14 0.10 0.05  − 0.06  − 0.17 0.75 1  
EndS ATL (β24)  − 0.04  − 0.09  − 0.14  − 0.12  − 0.10  − 0.05  − 0.07 0.13 0.13 0.10  − 0.31 0.15  − 0.43  − 0.43  − 0.26  − 0.49 0.19 0.20 0.25 0.31 0.19 0.16 0.65 0.61 1
  1. Significant differences (p ≤ 0.05) are highlighted in bold. LF-2D The length of the digit two-finger of the left hand.; LF-4D The length of the digit four-finger of the left hand; RF-2D The length of the digit two-finger of the right hand; RF-4D The length of the digit four-finger of the right hand; Dif-R-L-Ratio Difference right-fingers 2D:4D ratio minus left-fingers 2D:4D ratio; ISH isometric muscular strength of the hamstring muscles; ISQ isometric muscular strength of the quadriceps muscles; H:Q the strength of isometric hamstring /quadriceps ratio; VO2max maximal oxygen uptake; CMJ countermovement jump; ATL accumulated training load; EarS ATL the average of accumulated training load in early season; MidS ATL the average of accumulated training load in mid-season; EndS ATL the average of accumulated training load in end season