Análise de dados secundários da avaliação isocinética do joelho em jogadores de futebol com ou sem lesão do joelho: devemos analisar apenas o pico de torque?

Abstract

Among the assessment of muscle strength, the gold standard is the assessment with the isokinetic dynamometer, the agonist/antagonist ratio and the comparison between forces are the most used variables because they present a risk of injury. The movements performed in soccer bring with them the need for an assessment beyond the strength of these athletes. The muscle alteration present in the injuries can architecturally change the performance and the speed of recruitment of this musculature can be essential for individuals who practice soccer. The objective of the study is to evaluate the peak torque angle and the time to peak torque based on the hypothesis that injured athletes may present differences in these values. Materials and Methods: 71 male professional soccer players, aged 18 to 40 years, with (n:32) and without injury (n:39), who underwent isokinetic evaluation at the Laboratory of Analysis of Human Movement (LAHM) from the Federal University of Ceará (UFC), between January 2015 and December 2017. Data on peak torque angle and time to peak torque at speeds of 60°/s and 300°/s for the groups were tabulated and expressed to the SPSS system for statistical analysis of groups and intragroup of injured. Results: Among the data analyzed only the peak torque angle at 60°/s during flexion, time to peak torque at 300°/s during extension and the peak torque angle at 300°/s during extension had a significant p-value, as well as only the time variable peak torque at 300°/s during flexion had an acceptable p-value. Discussion: Taking into account the interest of some authors in values secondary to peak torque in the isokinetic evaluation, our study evaluated issues such as optimal length/tension as well as the reaction time of these muscles. Compared to other authors, the divergence between the evaluated values may be linked to a risk of injuries inherent to the demands of soccer. Conclusion: There are, as objectified and mentioned in the hypothesis, some divergences between injured and non-injured athletes in the secondary values and that these have instructions that can be considered important in the evaluation of the athlete and opens up new questions to be researched.