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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