High-intensity interval training on physical function in obese college students / Treinamento intervalado de alta intensidade sobre a função física de universitários obesos / Entrenamiento por intervalos de alta intensidad en la función física de estudiantes universitarios obesos

ABSTRACT Introduction: Obese students easily accept high-intensity interval training due to its combination of exercise and rest. It is believed that, besides promoting the reduction of body mass index due to its aerobic character, such training can also positively impact the physical function of its practitioners. Objective: Study the effects of high-intensity interval training on body indexes and physical function of obese college students. Methods: Twenty obese college students were selected for four weeks of training. Distributed by equal random selection, the experimental group received four sessions of high-intensity interval training per week. The duration of training from the beginning of the preparatory activity to the end of the stretching activity totaled 1.5h. The control group performed their daily activities without intervention. The relevant physical function indices of the volunteers were evaluated and recorded before and after the intervention. Results: The lean mass index of the students in the experimental group increased from 1463,846 ± 209,888Kcal to 1573,514 ± 194,492Kcal. The vital capacity increased from 2573.94 ml to 3553.98 ml. However, students in the control group showed no relevant changes. Conclusion: High-intensity interval training proved useful in improving college students' general health levels and helping them recover their normal body indexes. Level of evidence II; Therapeutic studies - investigation of treatment outcomes.

RESUMO Introdução: O treinamento intervalado de alta intensidade é facilmente aceitável pelos estudantes obesos devido à sua combinação de exercícios e repousos. Acredita-se que, além de promover a redução do índice de massa corporal devido ao seu caráter aeróbico, tal treinamento também possa impactar positivamente sobre a função física de seus praticantes. Objetivo: Estudar os efeitos do treinamento intervalado de alta intensidade sobre os índices corporais e a função física dos estudantes universitários obesos. Métodos: Vinte estudantes universitários obesos foram selecionados para quatro semanas de treinamento. Distribuídos por uma seleção aleatória igualitária, o grupo experimental recebeu quatro sessões de treinamento intervalado de alta intensidade por semana. A duração do treinamento desde o início da atividade preparatória até o final da atividade de alongamento totalizou 1,5h. O grupo de controle realizou suas atividades diárias, sem intervenções. Foram avaliados e registrados os índices de função física relevantes dos voluntários antes e após a intervenção. Resultados: O índice de massa magra dos alunos do grupo experimental aumentou de 1463.846 ± 209.888Kcal para 1573.514 ± 194.492Kcal. A capacidade vital elevou-se de 2573,94 ml para 3553,98 ml. Entretanto, os alunos do grupo de controle não apresentaram alterações relevantes. Conclusão: O treinamento intervalado de alta intensidade mostrou-se útil para melhorar o nível geral de saúde dos estudantes universitários e ajuda-los na recuperação de seus índices corporais normais. Nível de evidência II; Estudos terapêuticos - investigação dos resultados do tratamento.

Resumen Introducción: El entrenamiento por intervalos de alta intensidad es fácilmente aceptado por los estudiantes obesos debido a su combinación de ejercicio y descanso. Se cree que, además de favorecer la reducción del índice de masa corporal debido a su carácter aeróbico, este tipo de entrenamiento también puede repercutir positivamente en la función física de sus practicantes. Objetivo: Estudiar los efectos del entrenamiento por intervalos de alta intensidad sobre los índices corporales y la función física de estudiantes universitarios obesos. Métodos: Se seleccionaron veinte estudiantes universitarios obesos para cuatro semanas de entrenamiento. Distribuidos por igual selección aleatoria, el grupo experimental recibió cuatro sesiones semanales de entrenamiento por intervalos de alta intensidad. La duración del entrenamiento desde el inicio de la actividad preparatoria hasta el final de la actividad de estiramiento fue de 1,5 horas. El grupo de control realizó sus actividades cotidianas sin intervención. Se evaluaron y registraron los índices de función física relevantes de los voluntarios antes y después de la intervención. Resultados: El índice de masa magra de los alumnos del grupo experimental aumentó de 1463.846 ± 209.888Kcal a 1573.514 ± 194.492Kcal. La capacidad vital aumentó de 2573,94 ml a 3553,98 ml. Sin embargo, los alumnos del grupo de control no presentaron cambios relevantes. Conclusión: El entrenamiento por intervalos de alta intensidad demostró ser útil para mejorar el nivel de salud general de los estudiantes universitarios y ayudarlos a recuperar sus índices corporales normales. Nivel de evidencia II; Estudios terapéuticos - investigación de los resultados del tratamiento.

Research update on psychological stress and eating behaviors in children and adolescents / 中国学校卫生

Abstract@#Psychological stress and coping strategies are important factors affecting physical and mental health. Unhealthy eating behavior caused by stress is common in children and adolescents, which has not been fully clarified. In this paper, studies on the association of psychological stress with general eating behavior, abnormal eating behavior or eating disorders among children and adolescents were reviewed. The epidemiology and influencing factors were elaborated, and the possible physiological mechanism was summarized, in order to provide reference for the future research.

Haze weather health protection behavior and associated factors in adolescents / 中国学校卫生

Objective@#To investigate adolescent haze weather health protection behavior, and to provide scientific basis for behavioral intervention and health guidance for adolescents in haze weather.@*Methods@#From June 2015 to April 2016, 1 025 adolescents were selected from 22 classes in two middle schools of Baoding City, Hebei Province, by stratified cluster sampling method. General information questionnaire and the Brief Haze Weather Health Protection Behavior Assessment Scale Adolescent Version (BHWHPBAS AV) were used. Multiple linear regressions were conducted to explore factors affecting adolescent haze weather health protection behavior. Different models were used to confirm associations between influencing factors and BHWHPBAS AV scores.@*Results@#Adolescents had a low overall score of BHWHPBASAV (45.81±13.16). The score rate of self adjustment after haze weather was the highest (64.54%). The score rate of obtaining relevant knowledge before haze weather was the lowest (50.28%). Compared with adolescents in urban area, rural adolescents had a lower BHWHPBAS AV score ( β=-3.20, P <0.01). Compared with students (living with parents), those living without parents had a lower BHWHPBAS AV score ( β=-4.16, P =0.01). Compared with students never receive physical examination,those had received physical examination during the past years had a higher BHWHPBAS AV score ( β=4.44，5.66，9.04, P <0.01). Compared with students with no knowledge of respiratory system diseases, those with moderate to sufficient knowledge had a higher BHWHPBAS AV score ( β=9.34，12.19，P <0.01). These associations were stable and consistent.Multiple linear regression analysis showed that residence, residence with parents, physical examination and knowledge of respiratory diseases were the relevant factors of BHWHPBAS AV score ( P <0.05).@*Conclusion@#Adolescent haze weather health protection behavior level is low and is affected by many factors. Cooperation should be strengthened to conduct behavioral interventions and health guidance on haze health protection for adolescents, so as to promote healthy growth of adolescents.