## Materials and Methods
### Procedures and Evaluations
#### 2.2.1 Day 1--Anthropometry and Squat (SJ) and Counter Movement Jump (CMJ) Tests  
Anthropometric assessments were completed once at the initial testing period for convenience related to time and players' schedules. Body mass and height were measured by using a portable digital scale with Tanita Body Fat Analyzer (model TBF 105; Tanita Corporation of America, Inc, Arlington Heights, IL, USA). Body mass was measured with light clothes and without shoes. Height was measured without shoes. The precision of body mass and height measurement was to the nearest 0.1 kg and 0.1 cm, respectively. Body mass index (BMI) was calculated as body mass divided by the square of their height (kg/m\({}^{2}\)).  
Skinfold thickness was measured to the nearest mm, except for low values (usually 5 mm or less), when it was taken to the nearest 0.5 mm. These readings were made at four sites on all subjects, at the biceps, triceps, subscapular, and supra-iliac areas. These were conducted on the right side of the body with the subject standing in a relaxed condition, although no statistical difference between measurements on either side of the body have been found [20]. Skinfold thickness was determined using a Harpenden caliper (Baty International, Burgess Hill, Sussex, UK). Duplicate readings were taken at each site, and the average of the two was recorded. If the two readings differed by more than 2 mm, a third reading was conducted and the closest two were averaged. The sum of the four skinfold measurements was used as an estimate of body fat according to the sex- and age-specific equation [20], as previously reported in young athletes [21]:  
\[\%\;\text{Body fat}=(4.95/(\text{Density}-4.5))\times 100\]  
\[\text{where Density}=1.162-0.063\;(\text{LOG sum of 4 skinfolds}).\]  
The SJ and CMJ variables (jump height) were determined using photoelectronic cells (Optojump Next, Microgate, Italy), as described by [PERSON] et al. [22]. Jump heights were measured from the  
\begin{table}
\begin{tabular}{c c c} \hline \hline  & **ICC (95\% CI)** & **CV (95\% CI) [\%]** \\ \hline SJ (cm) & 1.00 (0.96–1.00) & 1.5 (1.2–2.3) \\ CMJ (cm) & 0.99 (0.96–1.00) & 1.5 (1.1–2.2) \\ Sprint 10 m (s) & 0.97 (0.94–0.99) & 5.5 (4.3–8.5) \\ Sprint 15 m (s) & 0.97 (0.94–0.98) & 2.1 (1.6–3.1) \\ Medicine Ball Throw (m) & 0.99 (0.96–1.00) & 1.2 (0.9–1.8) \\ \hline \hline \end{tabular}
\end{table}
Table 1: Intraclass correlation coefficient (ICC) and coefficient of variation (CV) for performance measures. Data were collected two weeks apart and thus represent between-day reliability. CI: confidence interval; SJ = squat jump; CMJ = countermovement jump.  
recorded contact and the flight time of vertical jumps with a frequency of 1 kHz. The SJ began with subjects' knees at 90\({}^{\circ}\), avoiding any downward movement. Subjects then performed a vertical jump with their arms akimbo by pushing upwards with their legs. After first being instructed to jump as fast and high as possible, the CMJ began from an upright position, with players making a rapid downward movement to a knee angle of \(\sim\)90\({}^{\circ}\) with their hands on their hips and hereafter beginning to push-off. Both tests were performed without an arm swing by keeping the hands fixed at the level of the pelvis and with knees and ankles extended at take-off and landing. The best performance of four jumps was recorded for each test, and a 30 s recovery was given between each trial.