Assessment of isometric endurance of the trunk muscles in adolescents of different ages and sex

Abstract

Introduction: The association between low back pain and low resistance of the stabilizers muscles trunk have been documented among adolescents. Objective: To evaluate the time of isometric endurance of trunk in adolescents. Methods: Adolescents (n = 520), between 10-19 years, underwent four trunk endurance tests with maintenance record in seconds. The qualitative performance classification was made using averages, minimum, maximum, and quartiles. For comparison between sex and age and the interaction of these factors, was used two-way Anova with Bonferroni post-test. Results: Males showed better performance on tests (p ≤ 0.003) and this increase is proportional to age. The presence of interaction between the two factors for the tests in extension and flexion shows that the performance differs between sexes and ages. Conclusion: The sex and age influence the performance of endurance tests of the trunk in adolescents.