Hipermobilidade em jovens atletas de voleibol feminino : impacto Qo desempenho funcional e muscular

Abstract

Introduction and Justification:The biomechanics of overhead throwing sports have the potential to alter movement patterns and lead to compensatory processes resulting in functional loss, pain, and decreased muscle strength. In young athletes, joint hypermobility may be associated with physical performance, influencing strength and functional capacities, especially in the shoulder joint. Objective:To compare muscle strength levels and functional capacity between young female volleyball athletes with and without joint hypermobility. Methods:This is an observational, analytical, cross-sectional study with a sample of 116 female athletes aged 10 to 17 years. The following instruments were used for assessment: sample characterization questionnaire, Closed Kinetic Chain Upper Extremity Stability Test (CKCUEST), Seated Medicine Ball Throw Test (SMBT), Beighton score, and isometric dynamometry for strength evaluation. Descriptive statistics were expressed as mean and standard deviation, median, and interquartile range. Data distribution was verified using the Kolmogorov Smirnov normality test. Categorical variables were reported as absolute and relative frequencies (%), and Bonferroni post hoc tests were applied.Results: The results of this study indicated no significant differences between joint hypermobility and shoulder strength or functional performance. Adjusted means, controlled for age, body mass, and pain, showed high p-values (p > 0.247; 0.511; 0.158) across all comparisons.Conclusion: Joint hypermobility did not show a significant influence on the isometric strength of shoulder internal and external rotators nor on the functional performance of the upper limbs in young volleyball athletes. These findings suggest that, in this age group, other factors such as sport experience, motor control, and training volume may have a greater impact on performance than isolated hypermobility. [resumo fornecido pelo autor]