## 2 Materials and Methods
### Kinanthropometric Evaluation  
Kinanthropometric measurements were taken according to the ISO 7250-1:2017 and the International Society for the Advancement of Kinanthropometry (ISAK) standard [29]. The measurements taken were as follows: four basic measurements (body mass, height, sitting height and arm span), three skinfolds (triceps, thigh and leg) and four girths (relaxed arm, flexed and contracted arm, middle- thigh and leg). A SECA 862 scale (SECA, Hamburg, Germany) with 100 g accuracy was used to measure body mass; a SECA 217 measuring stadiometer (SECA, Germany) with 1 mm accuracy was used to measure height and sitting height; an Avanutri wingspan meter (Avanutri, Tres Rios, Brazil) was used to measure arm span; a CESCORF inextensible metal tape (CESCORF, Porto Alegre, Brazil) was used tomeasure girths; and a Slimguide caliper (Creative Health Products, Ann Arbor, MI, USA) of 0.5 mm precision. All kinanthropometric measurements were measured two or three times by an anthropometrist level 2 accredited by ISAK, depending on whether the technical error of measurement (TEM) between the first two measurements was greater than 5% in skinfolds and 1% for the rest of the measurements, taking the mean or median, respectively, for subsequent analysis. The intraevaluator TEM was 0.03% for the basic measurements, 2.24% for the skinfolds and 0.36% for the girths, and its correlation coefficient with an expert anthropometrist level 4 was 0.99 for the basic measurements, 0.91 for the skinfolds and 0.99 for the girths. The temperature of the room where the measurements were taken was standardized at 24 \({}^{\circ}\)C, and all measurements were taken from 15:00 to 21:00.  
With the final values of the kinanthropometric measurements: to know the relationship between body mass and height, the BMI values were calculated (BMI = body mass/height\({}^{2}\)) [30]; to know the amount of subcutaneous fat, the \(\sum\)3 skinfolds were calculated (\(\sum\)3 skinfolds = triceps skinfold + thigh skinfold + leg skinfold); to know muscle areas and muscle development, the sum of \(\sum\)3 corrected girths were calculated (\(\sum\)3 corrected girths = corrected relaxed arm girth + corrected thigh girth + corrected leg girth) with the formula: corrected girth = girth - \(\pi\)\(\times\) skinfold [30]; to know the relationship between height and sitting height, the Cormic Index were calculated (Cormic Index = sitting height/height) \(\times\) 100); to know the relationship between arm span and height, the relative arm span were calculated (relative arm span = arm span/height) \(\times\) 100); and to know the distribution of body composition, the percentage of fat mass (%FM = 0.735*(triceps skinfold + leg skinfold) + 1) [31] and muscle mass (%MM = height*((0.0064*corrected relaxed arm girth\({}^{2}\)) + (0.0032*corrected thigh girth\({}^{2}\)) + (0.0015*corrected leg girth\({}^{2}\))) + (2.56*sex) + (0.136*age)) [32] were estimated, choosing these formulas because they were validated in a growing population [30].  
In addition, being an adolescent population, the BMI z-score was also calculated using the WHO Anthroplus software [33]. From these values, the players were classified following WHO criteria into the following categories: undernutrition (ZS \(\leq\)\(-\)2), underweight (ZS \(\leq\)\(-\)1), normal-weight (ZS = \(-\)1 and 1), overweight (ZS \(\geq\) 1) and obesity (ZS \(\geq\) 2).