Examinando por Autor "de Carvalho, Ricardo Souza"
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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 Estimated Oxygen Consumption with the Abbreviated Method and Its Association with Vaccination and PCR Tests for COVID-19 from Socio-Demographic, Anthropometric, Lifestyle, and Morbidity Outcomes in Chilean Adults(MDPI, 2022-06-01) Vásquez-Gómez, Jaime; Faúndez-Casanova, César; de Carvalho, Ricardo Souza; Castillo-Retamal, Franklin; Reyes, Pedro Valenzuela; Concha-Cisternas, Yeny; Luna-Villouta, Pablo; Álvarez, Cristian; Godoy-Cumillaf, Andrés; Hernández-Mosqueira, Claudio; Cigarroa, Igor; Garrido-Méndez, Alex; Matus-Castillo, Carlos; Castillo-Retamal, Marcelo; Ribeiro, Ivana LeaoCOVID-19 causes cardiovascular and lung problems that can be aggravated by confinement, but the practice of physical activity (PA) could lessen these effects. The objective of this study was to evaluate the association of maximum oxygen consumption (VO2 max) with vaccination and PCR tests in apparently healthy Chilean adults. An observational and cross-sectional study was performed, in which 557 people from south-central Chile participated, who answered an online questionnaire on the control of COVID-19, demographic data, lifestyles, and diagnosis of non-communicable diseases. VO2 max was estimated with an abbreviated method. With respect to the unvaccinated, those . who received the first (OR:0.52 [CI:0.29;0.95], p = 0.019) and second vaccine (OR:0.33 [CI:0.18;0.59], p = 0.0001) were less likely to have an increased VO2 max. The first vaccine was inversely associated with VO2 max (mL/kg/min) (β:−1.68 [CI:−3.06; −0.3], p = 0.017), adjusted for BMI (β:−1.37 [CI:−2.71; −0.03], p = 0.044) and by demographic variables (β:−1.82 [CI:−3.18; −0.46], p = 0.009); similarly occur for the second vaccine (β: between −2.54 and −3.44, p < 0.001) on models with and without adjustment. Having taken a PCR test was not significantly associated with VO2 max (mL/kg/min). It is concluded that vaccination significantly decreased VO2 max, although it did not indicate cause and effect. There is little evidence of this interaction, although the results suggest an association, sinceVO2 max could prevent and attenuate the contagion symptoms and effects. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.