Research Outputs
Changes in body composition and physical performance after a six-week international tour in young Chilean female tennis players
Junior tennis players travel a lot to play tennis tournaments; this causes them to spend a lot of time away from their homes and disrupts their training, which could reduce their performance and increase the risk of injury. The purpose of this study was to analyze the changes in physical performance and body composition after a six-week international tour in young Chilean female tennis players. Thirty young female tennis players (15.4 Ā± 0.6) participated in this study. Body weight, skinfolds, and perimeters were measured. Body fat percentage (BFP) and skeletal muscle mass (SMM) were calculated. For physical performance, 5 m sprint, the 505 with stationary start test (505 test), the pro-agility test, countermovement jump (CMJ), and medicine ball throw (MBT) were evaluated. The results show a significant increase in BFP and decrease in SMM (p < 0.01; d = ā0.18 and 0.19, respectively). In terms of physical performance, 5 m sprint, the 505 test (p < 0.01; d = ā0.95 and ā0.95, respectively), CMJ, MBT, and HJ significantly decreased post-tour (p < 0.05; d = 0.96, 0.89 and 0.47, respectively). We conclude that, after a six-week international tour, there were changes in body composition and a significant decrease in 5 m sprint, the 505 test, CMJ, and MBT.
AnĆ”lisis comparativo de la coordinaciĆ³n motora e Ćndice de Masa Corporal en escolares que participan Ćŗnicamente en clases de educaciĆ³n fĆsica y deportes extraescolares
El estudio tuvo como objetivo comparar la coordinaciĆ³n motora y el Ćndice de Masa Corporal en escolares que participan solo en las clases de educaciĆ³n fĆsica con aquellos que ademĆ”s participan de talleres deportivos extraescolares. El estudio fue transversal, de alcance descriptivo y comparativo. La muestra estuvo compuesta por 96 escolares (41 niƱas y 55 niƱos de 11.7Ā± 0.7 aƱos). Se midieron la talla y el peso corporal. Se calculĆ³ el Ćndice de Masa Corporal (IMC). La evaluaciĆ³n de la coordinaciĆ³n motora se llevĆ³ a cabo utilizando la baterĆa de Kƶrperkoordinations test FĆ¼r Kinder (KTK). Los resultados revelaron diferencias significativas entre el Grupo Deporte Extraescolar (GDEX) y el Grupo EducaciĆ³n FĆsica (GEF), en Saltos Monopedales, TransposiciĆ³n Lateral, puntaje total KTK (p<0.01) y Saltos Laterales (p<0.05), con un tamaƱo del efecto (TE) moderado (d= 0.40 a 0.66). Igualmente, los escolares del GDEX mostraron mejores valores con respecto al GEF en Peso corporal (p<0.05), e IMC (p<0.01), TE moderado (d= -0.49 y -0.54; respectivamente). Se concluye que los escolares que participan en talleres deportivos extraescolares presentan mejores niveles de coordinaciĆ³n motora, IMC y Peso corporal que aquellos que Ćŗnicamente participan de las clases de educaciĆ³n fĆsica.
Effects of a six-week international tour on the physical performance and body composition of young Chilean tennis players
In tennis, it is common for young male tennis players to spend several weeks away from their local training camps during the competition season, which could affect their performance. The purpose of the study was to analyze the effects of a six-week international tour on physical performance and body composition in young Chilean tennis players. Twenty-four men between the ages of 14 and 16 participated in this research. In body composition and anthropometric measurement, body weight, height, skinfolds, and perimeters were measured. Body fat percentage (BFP) and skeletal muscle mass (SMM) were calculated. For physical performance, 5-m and 10-m sprints, modified agility test (MAT test), countermovement jump (CMJ), and medicine ball throw (MBT) were evaluated. Results show that, in body composition, BFP and SMM significantly decreased post-tour (p < 0.05; effect sizes ranging from 0.23 to 0.33, respectively). In physical performance, agility and 5-m and 10-m sprints significantly decreased (p < 0.05, effect sizes ranging from ā0.63 to 1.10). We conclude that after a six-week international tour, BFP, SMM, agility, and speed (linear sprint) tend to decrease significantly, with a greater effect in the sprint tests.