Examinando por Autor "Flores-Rivera, Carol"
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Ítem Anthropometric characterization and physical performance by age and biological maturation in young tennis players(MDPI, 2021-10-02) Luna-Villouta, Pablo; Paredes-Arias, Marcelo; Flores-Rivera, Carol; Hernández-Mosqueira, Claudio; de Carvalho, Ricardo Souza; Faúndez-Casanova, César; Vásquez-Gómez, Jaime; Vargas-Vitoria, RodrigoThe 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. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.Ítem Association of agility with body composition and lower-extremity explosive muscle strength in young female tennis players(Federacion Espanola de Docentes de Educacion Fisica, 2023-02) Luna-Villouta, Pablo; Flores-Rivera, Carol; Paredes-Arias, Marcelo; Vásquez-Gómez, Jaime; Matus-Castillo, Carlos; Hernández-Mosqueira, Claudio; Hermosilla, Néstor Jofré; Vitoria, Rodrigo VargasThe objective of the research was to analyze the relationship between agility indicators with body composition and lower-extremity explosive muscle strength in young female tennis players. The study was observational, cross-sectional, correlational, and with descriptive characteristics. The sample consisted of 22 young Chilean tennis players (15.3±0.7 years old), selected in a non-probabilistic sampling for convenience. Anthropometric variables of weight, height, skin folds (triceps brachial, anterior thigh, and medial leg) and perimeters (arm, thigh, and leg) were measured. Body fat percentage (GC) and skeletal muscle mass (MME) were calculated. In addition, physical performance tests were applied; 505 with stationary start test (505), modified agility test (MAT), horizontal jump (SH), countermovement jump (CMJ) and Abalakov jump (ABK). The results showed that the agility tests (MAT and 505 tests) are better associated with the SH, 505 test (R2= 34% p<0.01) and MAT test (R2= 22%; p<0.05), in addition, for each centimeter of increase in the SH there is a decrease in the execution time of both agility tests (β=-0.02 s). On the other hand, the MME, GC, CMJ and ABK, do not show significant relationships with agility (p>0.05). It is concluded that agility shows a better association with the SH test in young Chilean tennis players, so that agility tests (505 and MAT) could be a specific method of evaluation in female tennis players. © Copyright: Federación Española de Asociaciones de Docentes de Educación Física (FEADEF).Ítem Creencias y prácticas sobre la perspectiva de género en el profesorado de Pedagogía en Educación Física en Chile(Federación Española de Docentes de Educación Física, 2023) Matus-Castillo, Carlos; Serra, Pedrona; Soler, Susanna; Vilanova, Anna; Flores-Rivera, Carol; Knijnik, Jorge; Luna-Villouta, PabloPhysical Education has been characterized by the reproduction of gender stereotypes and situations of inequality and discrimination. Likewise, teacher training is historically a masculinized area. By considering this context, this research had the following objectives: to analyze the beliefs and pedagogical practices on the gender perspective used by PETE lecturers; and to identify pedagogical practices with a gender perspective that could be used by PETE lecturers for the training of teachers in this career. The study was qualitative, using discourse analysis to process information from six focus groups with the participation of teacher educators from six Chilean public and private universities. The results have shown two predominant discursive positions among the teaching staff, the first of which was characterized by a greater sensitivity, awareness and openness to gender issues, both at the conceptual level and in pedagogical practices, and on the contrary, discourses were also identified that showed resistance and rejection of gender issues, both at the conceptual and methodological levels. The recommendations put forward by the participants to incorporate the gender perspective in this career focused on the design of the lesson plans and the contents of the subjects. © 2023 The authors.Ítem Effects of a Six-Week International Tour on the Physical Performance and Body Composition of Young Chilean Tennis Players(MDPI, 2023-01) Luna-Villouta, Pablo; Paredes-Arias, Marcelo; Flores-Rivera, Carol; Hernández-Mosqueira, Claudio; Vásquez-Gómez, Jaime; Matus-Castillo, Carlos; Zapata-Lamana, Rafael; Faúndez-Casanova, César; Jofré Hermosilla, Néstor; Villar-Cavieres, Natalia; Vargas-Vitoria, RodrigoIn 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. © 2023 by the authors.Ítem Physical activity habits and their relationship with sociodemographic factors in Chilean adolescents(Frontiers Media S.A., 2022-08) Fuentealba-Urra, Sergio; Rubio, Andrés; Flores-Rivera, Carol; González-Carrasco, Mónica; Oyanedel, Juan Carlos; Castillo-Quezada, Humberto; Céspedes-Carreño, Cristian; Pacheco-Carrillo, JaimePhysical activity plays an important role in the well-being and development of adolescents. Physical activity habits expressed in terms of frequency and duration are consistently associated with sociodemographic factors such as age, gender, and socioeconomic status. However, there is less evidence of the relationship between the type and context of physical activity in adolescents. The aim of this article is to analyze physical activity habits and their relationship with sociodemographic factors in Chilean adolescents. The cross-sectional study consisted of 7,263 adolescents aged between 10 and 20 years old, students from both public and private schools in all regions of Chile. Physical activity habits were examined by means of a self-report questionnaire. The age groups were classified according to the three stages of adolescence (early: 10 to 13, middle: 14 to 16, and late: 17 to 20 years old). Socioeconomic level was established based on the school vulnerability index (SVI) of the school attended by each adolescent. In the study it was obvious to the level of physical activity for the adolescents was below the international recommendations. A statistically significant association can also be found between the sociodemographic factors studied and the physical activity habits reported by the young people. The multivariate regression analysis established that the risk of not achieving the physical activity recommendations was 2.8 times higher in females than in males, 2.4 times higher in the older age groups (14–16 and 17–20 years old) compared to the 10–13-year age range and 1.1 times in the medium and high vulnerability groups than in the low socioeconomic vulnerability group. These findings highlight the importance of considering all these factors holistically whenever designing programs or public policies that promote the development of healthy physical activity habits in adolescents. Copyright © 2022 Fuentealba-Urra, Rubio, Flores-Rivera, González-Carrasco, Oyanedel, Castillo-Quezada, Céspedes-Carreño and Pacheco-Carrillo.