## 4 Discussion  
The aim of this study was to describe, compare, and associate the anthropometric profile with the level of physical fitness in the members of the Chile women's national football team, differentiating the participants by their playing position. The findings of this study in the anthropometric variables (Table 1) indicate that there were differences between playing positions in weight (\(p\) < 0.001) (ES = 0.330) and height (\(p\) = 0.002) (ES = 0.445), with Gs showing the greatest values in weight and height compared to the rest of the players. These data are in line with those reported in the report on the Canada 2015 World Cup [45], which describes that Gs (vs. field players) were the heaviest (67 \(\pm\) 5.2 vs. 59.8 \(\pm\) 6.1 kg) and tallest (173.6 \(\pm\) 4.1 vs. 166.4 \(\pm\) 6.6 cm). Something similar was found by [PERSON] et al. [11] with first-division players of the Tunisian league, where the goalkeepers presented a significantly higher difference (\(p\) < 0.001) in weight and height. However, these results are not in agreement with those obtained by [PERSON] et al. [46], who found no differences between football players of different playing positions in weight and height (\(p\) > 0.05). This could be due to the fact that their participants were division I collegiate female soccer players and our participants were elite players. Moreover, the mentioned study only analyzed 3 Gs, which was probably insufficient to detect statistically significant differences. Therefore, these results seem to indicate that the differences in body composition based on the playing position could respond to the differences in the specific demands between goalkeepers and field players in maximum sport conditions, such as in elite competitions [45]. Similar results were found with respect to %Fat, showing differences between playing positions (\(p\) = 0.010) (ES = 0.216) (Table 1), with Gs obtaining the greatest levels of %Fat; in this case, significant differences were detected between  
Figure 7: Simple linear regressions between yo-yo test and anthropometric variables (**A**): Muscle Percent; (**B**): Fat Percentage; (**C**): E6 Skinfolds and (**D**): Weight. Gs and Fs. In a recent study with professional football players, significant differences were reported (\(p\) = 0.036) in %Fat between players, with Gs showing the greatest %Fat values compared to the rest of the players [3], the same findings presented by [PERSON] et al. [11] where the outfield players had significantly (\(p\) < 0.001) lower fat percentages than the goalkeepers. Despite this study, as well as our findings, no significant differences were observed in body fat between field players. Regarding %Muscle and E6 skinfolds, no differences were found based on playing position (\(p\) = 0.067 and \(p\) = 0.057, respectively). Similar results were obtained by [PERSON] [3] and [PERSON] and colleagues [14], who found no differences (\(p\) > 0.05) in %Muscle or E6 skinfolds in football players. These results could be due to the fact that high-performance football players require certain muscle mass levels to respond to high levels of training stimuli and competitive demand [4]. To sum up, the most significant finding recorded in this study regarding the anthropometric variables is that there were no differences between the field players (Ms, Ds, and Fa); that is, only Gs exhibited differences with respect to the rest of the players. Table 2 shows the results obtained in the physical fitness tests, compared by playing position. Regarding RS, although Fs obtained the highest levels in this variable, there were no differences with the field players (Ds and Ms). However, Gs showed significantly lower values compared to Ds and Fs (\(p\) = 0.001) (ES = 0.290). RS is a variable that considers the generation of strength as a function of body weight (RM/BW) [47]. This is why Gs obtained the lowest RS, since they usually present the greatest values in body weight [45].