## 3 Results  
The sample included 22 adult (Table 1), amateur football players, all male (age: 22.3 \(\pm\) 3 years; height: 175.4 \(\pm\) 7.4 cm; weight: 74.9 \(\pm\) 11.6 kg; BMI: 24.2 \(\pm\) 2.6 kg/m\({}^{2}\)). The individuals played football for 13.5 \(\pm\) 3 years, mostly right-handed (\(n\) = 15; 68.2% vs. \(n\) = 7; 31.8%). Regarding the player position on the field, seven players were midfielders (31.8%), six were defenders (27.3%), five were forwards (22.7%) and four goalkeepers (18.2%). Table 1 shows the data regarding the characterization of the sample. Moderate to high scores were observed in the evaluated subjective indicators of well-being, with emphasis on motivation for the proposed tasks (9.0 \(\pm\) 1.2) and on the perception of general well-being (7.1 \(\pm\) 1.2). In the other two constructs, that is, sleep quality of the previous night and perception of fitness status, the values showed greater variation compared to the previous ones, with the scores being 6.7 \(\pm\) 1.7 and 6.1 \(\pm\) 2.1, respectively (Table 2). \begin{table}
\begin{tabular}{c c} \hline
**Age, Years** & 22.3 \(\pm\) 3.0 (18–32) \\
**Height, cm** & 175.4 \(\pm\) 7.4 (159.7–189.7) \\
**Weight, kg** & 74.9 \(\pm\) 11.6 (50.4–95.4) \\
**BMI, kg/m\({}^{2}\)** & 24.2 \(\pm\) 2.6 (19.8–29.9) \\ \hline
**Lower Limb Real Length (ASIS-medial malleolus), cm** & \\ Right & 94.5 \(\pm\) 5.7 (82.1–104.0) \\ Left & 94.7 \(\pm\) 5.8 (82.2–104.0) \\ \hline
**Dominant Side** & \\ Right & 15 (68.2) \\ Left & 7 (31.8) \\ \hline
**Player Position on the Pitch** & \\ Goalkeeper & 4 (18.2) \\ Defender & 6 (27.3) \\ Midfielder & 7 (31.8) \\ Forward & 5 (22.7) \\ \hline \end{tabular}
\end{table} 
Table 1: Sample characterization data (\(n\) = 22) a. Regarding the skills analyzed (vertical jump, balance and speed), the data are presented in Table 3. The mean vertical jump height was 32.4 \(\pm\) 5.9 cm, with scores varying between 20.2 and 48.7 cm. In the Y balance test, the mean values of absolute reach and normalized reach distances tended to be greater when the left lower limb was in support, in the anterior and posteromedial directions, and this difference was also noted after calculating the composite range distance (85.3 \(\pm\) 10.3%)--which was expected since 15 of the 22 participants were right-handed and, for example, technical gestures such as passing, shooting or tackling are performed with support on the non-dominant side. The 20 m sprint performance varied between 2.94 and 3.67 s, with the average value of 3.26 s.  
Regarding flexibility (Table 4), participants had slightly less flexibility on the left (4.9 \(\pm\) 4.4\({}^{\circ}\)) than on the right (4.5 \(\pm\) 3.9\({}^{\circ}\)) at the hip level. In turn, the knee extensor muscles presented very similar flexibility values for both lower limbs (Table 4). The sit-and-reach test average values (27.2 cm) are within the ACSM's Guidelines for Exercise Testing and Prescription [17] acceptable values for males between 20-29 years old. It should also be highlighted the diversity of values obtained, ranging from 6 to 44.5 cm. The correlation coefficient did not find any strong (0.7 \(\leq\) \(\rho\)\(\leq\) 0.89) or very strong (0.9 \(\leq\)\(\rho\)\(\leq\) 1.0) correlations between the flexibility tests and vertical jump height, balance or speed tests (Table 5) and the vertical jump showed a statistically significant moderate correlation with the flexibility of the left knee extensors (\(\rho\) = \(-\)0.426; \(p\) = 0.048). On the right side, however, the correlation was not statistically significant (\(\rho\) = \(-\)0.311; \(p\) = 0.160).