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 ± 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 = -0.18 and 0.19, respectively). In terms of physical performance, 5 m sprint, the 505 test (p < 0.01; d = -0.95 and -0.95, 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.

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 −0.63 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.

Anthropometric Characterization and Physical Performance by Age and Biological Maturation in Young Tennis Players.

The objective was to analyze anthropometric and physical performance variables as a function of chronological age and biological maturity in young Chilean tennis players. The study was observational, cross-sectional, with descriptive and analytical characteristics. Eighty-seven tennis players were evaluated (58 men 15.1 ± 0.8 years and 29 women, 15.3 ± 0.8 years). The measured anthropometric variables were a sprint test of 20m; a modified agility test; a sit-and-reach test and shoulder flexibility; manual grip strength; horizontal jump in feet; a medicine ball throw; a countermovement vertical jump; an abalakov vertical jump and a 20-m shuttle-run test. The growth velocity acceleration peak (APHV), skeletal muscle mass and fat mass were calculated, R2 and standard error of estimate (SEE) were examined. The results show that chronological age explained the anthropometric variables between 1 and 23% in men and 1 and 29% in women; by biological age, variables were explained between 3 and 53% in men and 2 and 42% in women. Of the physical performance variables, chronological age described between 2 and 24% of them in men and 1 and 29% in women; the same were explained by biological age between 1 and 19% in men and 1 and 26% in women. We conclude that anthropometric variables showed a better relationship with biological age, except for volume of fat tissue, while physical performance variables showed low association with both biological and chronological age.

Caracterización antropométrica y composición corporal de tenistas de elite varones y damas de Chile / Anthropometric characterization and body composition of male and female elite tennis players in Chile

RESUMEN: El objetivo del estudio fue determinar las características antropométricas y de composición corporal en jóvenes tenistas de elite chilenos. El estudio fue de carácter descriptivo de corte transversal. La muestra de 84 tenistas (58 varones 15,5 ± 0,76 años y 26 damas, 15,3 ± 0,8 años), fue seleccionada de forma no probabilística por conveniencia. Se evaluaron variables antropométricas de peso, estatura, estatura sentada, pliegues cutáneos (bíceps, tríceps, subescapular, supraespinal, abdominal, muslo anterior y pierna medial), perímetros (brazo flexionado, muslo medio y pierna) y diámetros (biepicondíleo de húmero y del fémur). Se realizaron análisis antropométricos y cálculos para determinar la composición corporal y el somatotipo de los sujetos participantes. Los resultados para los varones fueron, peso corporal 64,3±7,94 kg, estatura 1,74 ± 0,08 m, porcentaje de grasa 16,6±4,1 %, de componente Mesomorfo balan- ceado. Las damas presentaron un peso corporal 49,8±6,9 kg, estatura 1,65±0,03 m, porcentaje de grasa 19,3±4,8%,de componente Ectomorfo balanceado. En general, ambos grupos muestran características antropométricas y de composición corporal similares a otros grupos de tenistas juveniles, a excepción del somatotipo en el caso de las damas.

SUMMARY: The aim of the study was to determine the anthropometric characteristics and body composition in young Chilean elite tennis players aged 14 to 16 years. It was a descriptive cross-sectional study. A non-probability convenience sampling of 84 tennis players (58 males 15.5 ± 0.76 years old and 26 females, 15.3 ± 0.8 years old) was selected. Anthropometric variables of weight, height, sitting height, skin folds (biceps, triceps, subscapular, supraspinal, abdominal, anterior thigh and medial leg), perimeters (flexed arm, middle thigh and leg) and diameters (humerus and femur) were evaluated. Anthropometric analysis and calculations were performed to determine the body composition and somatotype of the participanting subjects. The results for males were, body weight 64.3 ± 7.94 kg, height 1.74 ± 0.08 m, percentage of fat 16.6 ± 4.1%, balanced mesomorph component. The females had a body weight of 49.8 ± 6.9 kg, height of 1.65 ± 0.03 m, percentage of fat 19.3 ± 4.8%, balanced ectomorph component. In general, both groups showed similar anthropometric and body composition characteristics as compared to other groups of young tennis players, with the exception of the somatotype in the case of the females.