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ABSTRACT Introduction With the continuous development of physical education teaching in colleges, the scientific method became essential for the best activity prescriptions, improving the training of the most diverse activities. However, resistance training in school physical education still lacks a scientific protocol. Objective Scientifically determine the resistance training load of students and predict their sports results. Methods This paper selected 30 student-athletes of athletics as research objects and designed the relevant resistance load training program for each athlete through the resistance load parameter table and the athletes' sports abilities and needs. At the beginning of week three, week six, and the end of the experiment, the data were measured, compared, and analyzed within the group. Results The scientific resistance load training program can optimize the indexes such as blood lactate, maximal oxygen consumption, and heart rate stabilization during exercise, proving effective despite a certain deviation compared to the predicted value. Conclusion According to the actual situation of athletes and the design of the table of exercise load parameters, it is believed that the determination and implementation of the resistance training program in athletes should receive further investigation, popularizing its use in other modalities. Level of evidence II; Therapeutic studies - investigation of treatment outcomes.
RESUMO Introdução Com o contínuo desenvolvimento do ensino da educação física nas faculdades, o método científico tornou-se um aliado imprescindível para as melhores prescrições de atividades, aprimorando o treinamento das mais diversas atividades. Porém, o treinamento de resistência na educação física escolar ainda carece de um protocolo científico. Objetivo Determinar cientificamente a carga de treinamento de resistência dos estudantes e prevendo os seus resultados esportivos. Métodos Este trabalho selecionou 30 atletas estudantes de atletismo como objetos de pesquisa, projetou o programa de treinamento de carga de resistência relevante para cada atleta através da tabela de parâmetros de carga de resistência e as próprias habilidades esportivas e necessidades esportivas dos atletas. No início da terceira semana, na sexta semana e no final da experiência, os dados foram medidos, comparados e analisados dentro do grupo. Resultados O programa científico de treinamento de carga de resistência pode otimizar os índices como o lactato de sangue, consumo máximo de oxigênio e estabilização da frequência cardíaca durante o exercício, provando ser eficaz, apesar de um certo desvio em comparação com o valor previsto. Conclusão De acordo com a situação real dos atletas e o desenho da tabela de parâmetros de cargas de exercício, acredita-se que a determinação e a implementação do programa de treinamento de resistência nos atletas devem receber maiores investigações, popularizando o seu uso em outras modalidades. Nível de evidência II; Estudos terapêuticos - investigação dos resultados do tratamento.
RESUMEN Introducción Con el continuo desarrollo de la enseñanza de la educación física en las facultades, el método científico se convirtió en un aliado esencial para las mejores prescripciones de actividades, optimizando el entrenamiento de las más diversas actividades. Sin embargo, el entrenamiento de la resistencia en la educación física escolar sigue careciendo de un protocolo científico. Objetivo Determinar científicamente la carga de entrenamiento de resistencia de los estudiantes y prever sus resultados deportivos. Métodos Este trabajo seleccionó 30 estudiantes atletas de atletismo como objetos de investigación, diseñó el programa de entrenamiento de carga de resistencia pertinente para cada atleta a través de la tabla de parámetros de carga de resistencia y las propias habilidades deportivas y necesidades deportivas de los atletas. Al principio de la tercera semana, en la sexta y al final del experimento, se midieron, compararon y analizaron los datos dentro del grupo. Resultados El programa de entrenamiento con carga de resistencia científica puede optimizar los índices como el lactato en sangre, el consumo máximo de oxígeno y la estabilización de la frecuencia cardíaca durante el ejercicio, demostrando su eficacia a pesar de una cierta desviación respecto al valor previsto. Conclusión De acuerdo con la situación real de los atletas y el diseño de la tabla de parámetros de carga de ejercicio, se cree que la determinación y aplicación del programa de entrenamiento de resistencia en los atletas debe recibir más investigaciones, popularizando su uso en otras modalidades. Nivel de evidencia II; Estudios terapéuticos - investigación de los resultados del tratamiento.
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Abstract@#Social media use and mental health problems in adolescents have long been a concern, but there is controversy in the conclusions on the direction of the relationship and the size of the effect. In order to clarify the relationship between social media and mental health, the paper mainly summarizes the concepts, mediating and moderating factors, as well as protective and risk factors, it also summarizes the limitations of past studies, so as to provide theoretical basis for future research directions.
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@#Objective To evaluate the outcomes and summarize the clinical experience of totally endoscopic mitral valve repair with artificial chordae implantation. Methods From May 2013 to June 2016, 71 patients with mitral valve insufficiency were admitted to our hospital who underwent totally endoscopic mitral valve repair with artificial chordae implantation. There were 47 males and 24 females with the age of 46.0±14.4 years ranging from 13-78 years. The pathogenesis included degenerative valvular diseases in 63 patients, congenital valvular diseases in 4, infectious endocarditis in 2, rheumatic disease in 1 and cardiomyopathy in 1. Prolapse of anterior, posterior, or both leaflets was present in 26 (36.6%), 19 (26.8%), and 25 (35.2%) patients, respectively; one patient (1.4%) presented valve annulus enlargement and thirteen were associated with commissure lesion. The mitral regurgitation area ranged from 4.2 to 26.3 cm2 (mean, 12.2±5.6 cm2). All the procedures were performed by total endoscopy under cardiac arrest. 5-0 Gore-tex sutures were used as the material of artificial chordae which was implanted one by one. Results There was no in-hospital death. One patient was transferred to mitral valve replacement, and one median sternotomy due to bleeding. The mean cardiopulmonary bypass time was 156.0±31.6 min and aortic cross-clamp time 110.0±20.1 min. We finally had 39 isolated mitral valve repair, 28 mitral valve repair combined tricuspid valve repair, 3 mitral valve repair combined atrial septal defect closure, and 1 mitral valve repair combined correction of partial anomalous pulmonary vein connection. Each patient was implanted artificial chordae of 2.5±1.7 (ranging from 1 to 7), and 65 patients received mitral annulus (full ring). The intraoperative transoesophageal echocardiography found no mitral regurgitation in 44 patients, the area of mitral regurgitation was 0-2 cm2 in 24, and 3 patients with mitral regurgitation>2 cm2 experienced serious systolic anterior motion. Of the 3 patients with systolic anterior motion (SAM), one transferred to mitral valve replacement, one underwent mitral re-repair, and one took conservative treatment. The mean follow-up was 12.7±10.5 months (range: 1 to 36 months), while 2 patients were lost to follow up with the follow-up rate of 97.2%. Recurrent severe regurgitation occured in 3 patients, moderate in 5, mild or trivial in 27 and no regurgitation in 36. During the follow-up, 1 patient died of myocardiopathy-induced heart failure post discharge, 1 suffered from cerebral infarction, and no patient underwent reoperation. Conclusion The totally endoscopic surgical treatment of mitral valvuloplasty with artificial chordae is reliable for patients with mitral valve prolapse, which provides favorable clinical efficacy and outcomes. The difficulty lies in how to determine the appropriate length of the chordae and keep the stability of length.