Creatine supplementation does not decrease oxidative stress and inflammation in skeletal muscle after eccentric exercise     

Luciano A. Silva  Camila B. Tromm  Guilherme Da Rosa  Karoliny Bom  Thais F. Luciano  Talita Tuon 《Journal of sports sciences》2013,31(11):1164-1176

Abstract

Thirty-six male rats were used; divided into 6 groups (n = 6): saline; creatine (Cr); eccentric exercise (EE) plus saline 24 h (saline + 24 h); eccentric exercise plus Cr 24 h (Cr + 24 h); eccentric exercise plus saline 48 h (saline + 48 h); and eccentric exercise plus Cr 48 h (Cr + 48h). Cr supplementation was administered as a solution of 300 mg · kg body weight^?1 · day^?1 in 1 mL water, for two weeks, before the eccentric exercise. The animals were submitted to one downhill run session at 1.0 km · h^?1 until exhaustion. Twenty-four and forty-eight hours after the exercise, the animals were killed, and the quadriceps were removed. Creatine kinase levels, superoxide production, thiobarbituric acid reactive substances (TBARS) level, carbonyl content, total thiol content, superoxide dismutase, catalase, glutathione peroxidase, interleukin-1b (IL-1β), nuclear factor kappa B (NF-kb), and tumour necrosis factor (TNF) were analysed. Cr supplementation neither decreases Cr kinase, superoxide production, lipoperoxidation, carbonylation, total thiol, IL-1β, NF-kb, or TNF nor alters the enzyme activity of superoxide dismutase, catalase, and glutathione peroxides in relation to the saline group, respectively (P < 0.05). There are positive correlations between Cr kinase and TBARS and TNF-α 48 hours after eccentric exercise. The present study suggests that Cr supplementation does not decrease oxidative stress and inflammation after eccentric contraction.  相似文献   

Concurrent Validity and Reliability of Alternative Computer Game for the Coincidence-Anticipation Timing Task     

Tânia Brusque Crocetta  Regiani Guarnieri  Thaís Massetti  Talita Dias da Silva  Renata Thaís de Almeida Barbosa  Jennifer Yohanna Ferreira de Lima Antão 《Measurement in physical education and exercise science》2019,23(2):169-185

The coincidence-anticipation timing (CAT) task assesses one facet of cognitive and motor performance and is used to understand the human visuo-motor system involved in intercepting the moving object. To assess the test–retest reliability and the concurrent validity in the Bridge Games package (Bridge) developed to assess the CAT task, the scores of 224 healthy subjects (M = 52.2, SD = 19.5 years old) were measured using the Bridge and the ‘gold standard’ Bassin Anticipation Timer (Bassin). A mean block of absolute, constant, and variable errors was calculated. Reliability and validity were expressed using intraclass correlation coefficients (ICC_2,k), standard error of measurement, minimal detectable change, and Pearson’s correlation. Reliability was good to excellent for all blocks (.73 ≤ ICC ≤ .88), and the validity was good to excellent when compared using Pearson’s correlation coefficient, suggesting that the two tests may have similar properties. Bridge is an alternative to existing clinical tests for the CAT task.  相似文献   

Self‐Assessment in Art Education through a Visual Rubric     

Talita Groenendijk  Andrea Krpti  Folkert Haanstra 《The International Journal of Art & Design Education》2020,39(1):153-175

A tool for self assessment in secondary art education was developed and tested. The tool includes rubrics for assessing production and reception activities in art education and consists of visual and text rubrics. The criteria in the rubrics are based on the Common European Framework of Reference for Visual Literacy which was developed by The European Network of Visual Literacy (ENViL). The way teachers and students use the rubrics, whether they consider them helpful and to what extent students’ self‐assessments are in line with teacher assessments was studied. It was concluded that teachers work with the rubrics intensively and both students and teachers appreciate its visual form. However, it was found that the agreement between teachers and students about the students’ scores was moderate and needed to improve. The results show that it is untrue that students, or boys in particular, overestimate their own performance in art education. The current study contributes to the development of feasible and valid assessment criteria and instruments in secondary art education.  相似文献