Use of latent class analysis as a method of assessing the physical activity level, sedentary behavior and nutritional habit in the adolescents' lifestyle: A scoping review.

BACKGROUND: Currently, adolescents' lifestyle is commonly characterized by physical inactivity, sedentary behavior, and inappropriate eating habits in general. A person-oriented approach as Latent Class Analysis (LCA) can offer more insight than a variable-centered approach when investigating lifestyle practices, habits, and behaviors of adolescent population. OBJECTIVE: The aim of the present study was to assess which variables are mostly used to represent the physical activity level, sedentary behavior SB) and nutritional habit in the adolescents' lifestyle in studies that used the LCA. DESIGN: Scoping review. METHODS: The study was a performed in accordance with the proposed criteria for systematic reviews and meta-analyses-Preferred Reporting Items for Systematic Reviews and Meta-Analyses and registered in PROSPERO (CRD42018108444). The original articles were searched in MEDLINE/PubMed, Scopus, ScienceDirect, Web of Science, PsycINFO, and SPORTdiscus. The Quality Assessment Tool analyzed the risk of bias of the included studies. RESULTS: 30 original articles were selected. The physical activity level (28 studies), SB and nutritional habits (18 studies) were the most common variable used to evaluate the adolescent's lifestyle by LCA model. Specifically, physical inactivity and high SB were the manifest variables with higher frequency in the negative latent classes (LCs) in adolescent girls. On the other hand, physical exercises and sports were activities more commonly labeled as positive LCs. CONCLUSIONS: The LCA models of the most of selected studies showed that physical inactivity, high SB were the most common in the LCs with negative characteristics of the adolescents' lifestyle. Better understanding the results of analyzes of clusters of multivariate behaviors such as the LCA can help to create more effective strategies that can make the lifestyle of adolescents healthier.

Körperkoordinationstest Für Kinder (KTK) for Brazilian Children and Adolescents: Factor Analysis, Invariance and Factor Score.

The decrease in children motor competence, with a consequent reduction in the levels of physical activities and fitness, impacting health negatively, has affected children across countries. In addition to consistent intervention strategies, it is necessary to use appropriate instruments. The Körperkoordinationstest Für Kinder (KTK) is a reliable and low-cost motor coordination (MC) test used in several countries but lacking psychometric evidence in the Brazilian population. The present study investigates the factor structure of KTK in a Brazilian sample; and, compared four possibilities of calculating the factorial score of the test, precisely the sum of the scores, sum of the standard scores, weighted method, and the refined method. The participants of the study consisted of 565 volunteers (49.9% boys), from 5 to 10 (7.93 ± 1.51) years of age, with a body mass index (BMI) means of 17.04 (±2.81). The results showed that the KTK factor structure was adequate to the model for the total sample, by sex, and by age groups. However, the results did not confirm the invariance between sexes and age groups. Besides, our result showed that the sum of the raw scores of the subtests could be used as the factor score method in KTK. In the end, we conclude that the KTK is a valid test to measure the MC of Brazilian children and adolescents, with features that qualify it as a useful instrument both for research and for the practice.

Brazilian version (acsi-28br) of athletic coping skills inventory-28 / Versão brasileira (acsi-28br) do athletic coping skills inventory-28 / Versión brasileña (acsi-28br) del athletic coping skills inventory-28

ABSTRACT Introduction: Coping is defined as a process based on motor, behavioral, and cognitive effort to deal with the psychophysical demands that exceed an individual's capacity. One of the instruments used most often for evaluating coping skills is the Athletic Coping Skills Inventory-28 (ACSI-28). Objective: This study aimed to validate the Brazilian version of the Athletic Coping Skills Inventory-28 (ACSI-28). The ACSI-28 is a multidimensional inventory developed to evaluate the different methods used by athletes to cope with sports pressure. Methods: The sample comprised 667 Brazilian athletes: male (n = 467; 70%); female (n = 200; 30%) with mean age 25 ± 5 years and eight (± 5) years of experience in individual sports (n = 182; 27.3%) or team sports (n = 485; 72.7%). Results: For construct validity, the relational structure of the items that comprise the original version of ACSI-28 was analyzed using EFA. The Kaiser-Meyer-Olkin measure (KMO = .83) and the Bartlett sphericity test (p <.0001) indicated adequate adjustment of the data to the factorial analyses. The reliability of the instrument was assessed by measuring internal consistency and by the stability of the measurement (test-retest). Conclusion: The Brazilian version of Athletic Coping Skills Inventory-28 was preliminarily considered valid. Level of Evidence III; Retrospective comparative study.

RESUMO Introdução: Coping é definido como um processo baseado no esforço motor, comportamental e cognitivo para lidar com as demandas psicofísicas que excedem a capacidade de um indivíduo. Um dos instrumentos mais utilizados para avaliar as habilidades de coping é o Athletic Coping Skills Inventory-28 (ACSI-28). Objetivo: Este estudo teve como objetivo validar a versão brasileira do Athletic Coping Skills Inventory-28 (ACSI-28). O ACSI-28 é um inventário multidimensional desenvolvido para avaliar os diferentes métodos utilizados pelos atletas para lidar com as pressões do esporte. Métodos: A amostra incluiu 667 atletas brasileiros: sexo masculino (n = 467; 70%); sexo feminino (n = 200; 30%) com média de idade de 25 ± 5 anos e oito anos (±5) de experiência em esportes individuais (n = 182; 27,3%) ou coletivos (n = 485; 72,7%). Resultados: Para a validade da construção, a estrutura relacional dos itens que compõem a versão original do ACSI-28 foi analisada usando o EFA. A medida Kaiser-Meyer-Olkin (KMO = 0,83) e o teste de esfericidade de Bartlett (p < 0,0001) indicaram ajuste adequado dos dados das análises fatoriais. A confiabilidade do instrumento foi avaliada medindo-se a consistência interna e pela estabilidade da medida (teste-reteste). Conclusões: A versão brasileira do Athletic Coping Skills Inventory-28 foi preliminarmente considerada válida. Nível de Evidência III; Estudo retrospectivo comparativo.

RESUMEN Introducción: Coping se define como un proceso basado en el esfuerzo motor, comportamental y cognitivo para hacer frente a las demandas psicofísicas que superan la capacidad de un individuo. Uno de los instrumentos más utilizados para evaluar las habilidades de coping es el Athletic Coping Skills Inventory-28 (ACSI-28). Objetivo: Este estudio tuvo como objetivo validar la versión brasileña del Athletic Coping Skills Inventory-28 (ACSI-28). El ACSI-28 es un inventario multidimensional desarrollado para evaluar los diferentes métodos utilizados por los atletas para lidiar con las presiones del deporte. Métodos: La muestra incluyó 667 atletas brasileños: sexo masculino (n = 467; 70%); sexo femenino (n = 200; 30%) con edad promedio de 25 ± 5 años y ocho (± 5) años de experiencia en deportes individuales (n = 182; 27,3%) o en equipo (n = 485; 72,7%). Resultados: Para la validez de la construcción, la estructura relacional de los elementos que componen la versión original del ACSI-28 fue analizada usando el EFA. La medida Kaiser-Meyer-Olkin (KMO = 0,83) y la prueba de esfericidad de Bartlett (p < 0,0001) indicaron un ajuste adecuado de los datos a los análisis factoriales. La confiabilidad del instrumento fue evaluada midiendo la consistencia interna y la estabilidad de la medida (prueba-reprueba). Conclusiones: La versión brasileña del Athletic Coping Skills Inventory-28 fue preliminarmente considerada válida. Nivel de Evidencia III; Estudio retrospectivo comparativo.

Análise do flow-feeling no tênis / Analysis of flow-feeling in tennis

O objetivo deste estudo é analisar as características do flow-feeling no tênis. São selecionados dez atletas masculinos, idade (média±dp): 21,2±2,94, competindo em um torneio oficial da Associação de Tenistas Profissionais (ATP). Os dados são coletados por meio de uma entrevista semiestruturada com questões relacionadas ao flow-feeling. As entrevistas são analisadas pelo método de análise de conteúdo. São avaliadas as Unidades de Registros (UR) das respostas de cada atleta e as UR de cada dimensão do flow . As dimensões: Concentração Intensa na Tarefa, Controle Absoluto das Ações, Objetivos Claros e Equilíbrio Desafio-Habilidade são as dimensões mais citadas, equivalendo a 63,52% de todas as UR citadas pelos atletas. Conclui-se que no tênis competitivo existem dimensões mais latentes, e o aparecimento de outras características, como a importância do condicionamento físico para experimentar o flow.

The aim of the study was to analyze the characteristics of flow-feeling in tennis. For this, 10 male athletes, aged 21.2±2.94, competing in official tournament of Association of Professional Tennis players (ATP) have participated in the study. Data were collected through a semi-structured interview with questions related to the flow-feeling. The interviews was analyzed through of content analysis method. The recording units (RU) of responses of each athlete and the RU of each dimension of flow were evaluated. The dimensions Concentration on Task at Hand, Sense of Control and Challenge-Skill Balance were the most cited dimensions, equivalent to 63.52% of all the UR cited by athletes. In competitive tennis there are dimensions more latent and the emergence of others characteristics, such as the importance of physical conditioning to experience the flow.