# Body Composition and Physical Performance by Playing Position in Amateur Female Soccer Players
## 3 Results  
The primary characteristics and classification of the groups according to playing position are presented in Table 1. In terms of body composition by playing position, significant differences were reported in fat-free mass between groups (F\({}_{(3,96)}=17.4\); \(p=0.000\)), in favor of midfielders vs. goalkeepers (\(p=0.00\); ES = 1.77, _large effect_, \(\Delta=27\%\)) and defenders (\(p=0.00\); ES = 2.14, _large effect_; \(\Delta=26.5\%\)) and forwards (\(p=0.00\); ES = 1.13, _large effect_; \(\Delta=15.8\%\)). Meanwhile, no significant differences were found when comparing goalkeepers vs. defenders (ES = 0.03; _small effect_; \(\Delta=0.3\%\)), goalkeepers vs. forwards (ES = 0.65; _moderate effect_; \(\Delta=6.9\%\)), and defenders vs. forwards (ES = 0.40; _small effect_; \(\Delta=6.5\%\)). In terms of lower body fat percentages, significant differences were reported between groups (F\({}_{(3,96)}=7.00\); \(p=0.000\)), in favor of midfielders vs. goalkeepers (\(p=0.00\); ES = 1.41, _large effect_; \(\Delta=26.7\%\)) and forwards (\(p=0.008\); ES = 1.05, _large effect_; \(\Delta=27\%\)), but no significant differences were reported between midfielders and defenders (ES = 0.60; _moderate effect_; \(\Delta=4.4\%\)). Furthermore, no significant differences were found when comparing goalkeepers vs. defenders (ES = 0.05; _small effect_; \(\Delta=6.7\%\)), goalkeepers vs. forwards (ES = 0.65; _moderate effect_; \(\Delta=6.9\%\)), and defenders vs. forwards (ES = 0.40; _small effect_; \(\Delta=5.7\%\)). Figure 3 presents the comparison of body composition by playing position. In terms of physical performance in the CM] and SJ test, no significant differences were found between groups in CM] (F\({}_{(3,96)}=1.61\); \(p=0.19\)) and SJ (F\({}_{(3,96)}=3.32\); \(p=0.23\)): comparing goalkeepers vs. defenders in CM] (ES = 0.35, _small effect_; \(\Delta=6.7\%\)) and SJ (ES = 0.77, _moderate effect_; \(\Delta=9.2\%\)), vs. midfielders in CM] (ES = 0.12; \(\Delta=2.0\%\)) and SJ (ES = 1.31, _large effect_; \(\Delta=13\%\)), vs. forwards in CM] (ES = 0.20, _small effect_; \(\Delta=3.0\%\)) and SJ \begin{table}
\begin{tabular}{l c c c c} \hline \hline  & **Goalkeepers** & **Defenders** & **Midfielders** & **Fowards** \\  & **(\(\mu\) = 20)** & **(\(\mu\) = 38)** & **(\(\mu\) = 52)** & **(\(\mu\) = 50)** \\ \hline
**Age (years old)** & 26.7 \(\pm\) 3.82 & 27.8 \(\pm\) 3.12 & 26 \(\pm\) 3.08 & 27.9 \(\pm\) 2.90 \\
**Body mass (kg)** & 71.2 \(\pm\) 5.5 & 63.4 \(\pm\) 6.2 & 61.5 \(\pm\) 9.3 & 64.1 \(\pm\) 8.1 \\ Height (m) & 1.73 \(\pm\) 4.2 & 1.68 \(\pm\) 5.3 & 1.65 \(\pm\) 8.1 & 1.67 \(\pm\) 6.2 \\
**BMI (kg/m\({}^{2}\))** & 23.8 \(\pm\) 5.3 & 22.5 \(\pm\) 7.4 & 22.6 \(\pm\) 7.9 & 23.0 \(\pm\) 4.2 \\
**Fat-free mass (kg)** & 25.9 \(\pm\) 3.90 & 26 \(\pm\) 2.17 & 32.9 \(\pm\) 4.00 & 27.7 \(\pm\) 5.08 \\
**Body fat (\%)** & 37.4 \(\pm\) 6.77 & 32.9 \(\pm\) 10.6 & 27.4 \(\pm\) 7.33 & 34.8 \(\pm\) 6.65 \\
**CM] (cm)** & 29.8 \(\pm\) 4.79 & 31.8 \(\pm\) 5.26 & 30.4 \(\pm\) 4.93 & 28.9 \(\pm\) 4.12 \\
**S] (cm)** & 26.9 \(\pm\) 3.12 & 29.4 \(\pm\) 3.30 & 30.4 \(\pm\) 2.13 & 28.5 \(\pm\) 2.15 \\
**DJ (cm)** & 19.5 \(\pm\) 2.48 & 20.5 \(\pm\) 2.34 & 24.4 \(\pm\) 2.56 & 20.4 \(\pm\) 2.02 \\
**Ball-kicking speed, dominant foot (km/h)** & 53.2 \(\pm\) 4.13 & 57.9 \(\pm\) 5.29 & 59.5 \(\pm\) 6.03 & 57.4 \(\pm\) 5.54 \\
**Ball-kicking speed, non-dominant foot (km/h)** & 51.3 \(\pm\) 4.58 & 53.2 \(\pm\) 3.83 & 55.2 \(\pm\) 5.08 & 53.0 \(\pm\) 3.88 \\
**10 m sprint (s)** & 2.61 \(\pm\) 0.47 & 2.58 \(\pm\) 0.46 & 2.37 \(\pm\) 0.41 & 2.44 \(\pm\) 0.49 \\
**20 m sprint (s)** & 5.53 \(\pm\) 0.08 & 5.41 \(\pm\) 0.93 & 5.33 \(\pm\) 0.86 & 5.39 \(\pm\) 0.08 \\
**30 m sprint (s)** & 8.54 \(\pm\) 1.17 & 8.49 \(\pm\) 1.18 & 7.71 \(\pm\) 1.30 & 7.82 \(\pm\) 1.38 \\ \hline \hline \end{tabular} Note: BMI = body mass index; CM] = countermovement jump; SJ = squat jump; DJ = drop jump.  
\end{table} 
Table 1: Characteristics and physical profiles of the female soccer players according to playing position.