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. 2019 Mar 29;10:522. doi: 10.3389/fpsyg.2019.00522

Table 1.

Variables that characterize the studied sample in goalkeepers and field players.

Goalkeepers Field players All
Variables (n = 22) (n = 145) (n = 167)



X SD X SD X SD
Age (years) 14.7 2.4 15.2 2.4 14.9 2.4
Biological age (PHV) 13.80* 0.1 14.7 0.6 14.6 0.6
Weight (kg) 69.2* 15.1 60.5 13.1 61.7 14.1
Height (cm) 177.7* 12.9 167.2 16.5 168.7 16.6
Sitting height (cm) 90.5* 7.7 87.2 6.5 87.7 6.8
Length of the foot (cm) 26.8 1.5 25.3 1.59 25.5 1.7
Arm circumference (cm) 26.6* 3.3 24.4 3 24.8 3.2
D. Humerus (cm) 7.0 0.8 6.7 0.7 6.7 0.7
BMD (g/cm2) 1.2 0.2 1.2 0.2 1.2 0.2
FFM (kg) 50.0* 16.1 47.6 11.9 47.4 13.3

X, average; SD, standard deviation; PHV, peak height velocity; C, circumference; D, diameter; BMD, bone mineral density; FFM, fat free mass; p < 0.05.