Nutritional intervention on post-training fatigue in college athletes / Intervenção nutricional na fadiga pós-treino em atletas universitários / Intervención nutricional en la fatiga post-entrenamiento en deportistas universitarios

ABSTRACT Introduction: The modulation of post-training fatigue in colleges and universities is an important part of today's physical education. The adjustment of sports fatigue is a fundamental aspect of modern college physical education, and its control is of great importance for the elevation in the sport level of athletes. Objective: Explore the effects of nutritional intervention on post-training fatigue in college athletes. Methods: 40 athletes were randomly selected as volunteers for the research, divided into control and experimental group, and practiced the same type of exercise and same intensity. The athletes in the experimental group took food in strict accordance with the food mixture described in the article, while the control group kept their regular diet unchanged. After the experiment, sports training was performed, followed by muscle creatine enzyme measurement and laboratory analysis of blood urea. These data were compared and analyzed with those before the experiment. Results: After adjusting the dietary structure, the CK and Bu indices of the athletes in the experimental group showed a downward trend, indicating that adjusting the nutritional structure can effectively improve the post-training fatigue of college athletes. Conclusion: It is recommended that physical education teachers and college coaches adjust the lifestyle and dietary structure according to the actual situation of the students, aiming to promote integral development and improved sports performance. Level of evidence II; Therapeutic studies - investigation of treatment outcomes.

RESUMO Introdução: A modulação da fadiga pós-treino nas faculdades e universidades é uma parte importante da atual educação física universitária. O ajuste da fadiga esportiva é um aspecto fundamental da educação física universitária moderna e seu controle é de grande importância para a elevação no nível esportivo dos atletas. Objetivo: Explorar os efeitos da intervenção nutricional sobre a fadiga pós-treino dos atletas universitários. Métodos: Foram selecionados 40 atletas aleatoriamente como voluntários para a pesquisa, divididos em grupo controle e experimental, praticaram o mesmo tipo de exercício físico e com a mesma intensidade. Os atletas do grupo experimental tomaram alimentos em estrita conformidade com a mistura alimentar descrita no artigo, enquanto o grupo de controle manteve sua alimentação regular inalterada. Após o experimento, foi realizado um treinamento esportivo, seguido de aferição da enzima creatina muscular e análise laboratorial de ureia no sangue. Esses dados foram comparados e analisados com os anteriores ao experimento. Resultados: Após o ajuste da estrutura dietética, os índices de CK e Bu dos atletas do grupo experimental mostraram uma tendência descendente, indicando que o ajuste da estrutura nutricional pode efetivamente melhorar a fadiga pós-treino dos atletas universitários. Conclusão: Recomenda-se aos professores de educação física e treinadores universitários ajustarem os hábitos de vida e estrutura alimentar de acordo com a situação real dos alunos, visando a promoção do desenvolvimento integral e melhora no desempenho esportivo. Nível de evidência II; Estudos terapêuticos - investigação dos resultados do tratamento.

Resumen Introducción: La modulación de la fatiga post-entrenamiento en colegios y universidades es una parte importante de la educación física universitaria actual. El ajuste de la fatiga deportiva es un aspecto fundamental de la educación física universitaria moderna y su control es de gran importancia para la elevación del nivel deportivo de los atletas. Objetivo: Explorar los efectos de la intervención nutricional sobre la fatiga post-entrenamiento en atletas universitarios. Métodos: 40 atletas fueron seleccionados al azar como voluntarios para la investigación, divididos en grupo control y experimental, practicaron el mismo tipo de ejercicio físico y con la misma intensidad. Los atletas del grupo experimental tomaron alimentos siguiendo estrictamente la mezcla de alimentos descrita en el artículo, mientras que el grupo de control mantuvo su dieta habitual sin cambios. Tras el experimento, se llevó a cabo una sesión de entrenamiento deportivo, seguida de la medición de la enzima creatina muscular y el análisis de laboratorio de la urea en sangre. Estos datos se compararon y analizaron con los anteriores al experimento. Resultados: Tras ajustar la estructura dietética, los índices de CK y Bu de los atletas del grupo experimental mostraron una tendencia descendente, lo que indica que el ajuste de la estructura nutricional puede mejorar eficazmente la fatiga post-entrenamiento de los atletas universitarios. Conclusión: Se recomienda que los profesores de educación física y los entrenadores universitarios ajusten el estilo de vida y la estructura nutricional de acuerdo con la situación real de los estudiantes, con el objetivo de promover el desarrollo integral y la mejora del rendimiento deportivo. Nivel de evidencia II; Estudios terapéuticos - investigación de los resultados del tratamiento.

Scope and method of image registration and clinical target volume margin for central-type non-small cell lung cancer in image-guided radiotherapy / 中南大学学报(医学版)

OBJECTIVE@#To determine the influence of different registration scopes and methods on kilo-voltage cone beam CT (kVCBCT) image and CT image and to estimate the appropriate clinical target volume (CTV)-to-planned target volume (PTV) margin for central-type non-small cell lung cancer in image-guided radiation therapy (IGRT).@*METHODS@#Twenty-six patients with central-type non-small cell lung cancer (NSCLC) who received IGRT were enrolled in this study and totally 104 flames of kVCBCT scanning acquired before radiotherapy were analyzed. First, registrations were performed by gray plus manual match and were compared among different registration scopes of tumor and tumor plus vertebra. Then, the results of registration as well as time cost using tumor plus vertebra as registration scope were compared among different registration methods of gray plus manual match and bone plus manual match. At last, 200 registrations using tumor plus vertebra as the registration scope performed by bone plus manual match were recorded and the CTV-to-PTV margin was calculated.@*RESULTS@#There was no significant difference in X, Y and Z translational and rotational movements between the registration scopes of tumor and tumor plus vertebra when gray plus manual match was used as the registration method (P>0.05). The registration results of gray plus manual match and bone plus manual match were equal when tumor plus vertebra was used as the registration scope (P>0.05), but the time cost of bone plus manual match [(1.9±0.3) min] was shorter than that of gray plus manual match [(3.1±0.2) min]. The CTV-to-PTV margins were 5.3, 4.9 and 5.7 mm in X, Y, and Z directions respectively.@*CONCLUSION@#For central-type NSCLC, tumor and vertebra can be used as registration scope and the bone plus manual match is suggested in IGRT. To avoid errors, we suggest a CTV-to-PTV margin of 6 mm.