Efeitos agudos de exercícios para a musculatura intrínseca do pé na biomecânica da corrida e na funcionalidade de membros inferiores de corredores de longa distância

Abstract

Purpose: This study aimed to investigate the acute effects of foot core exercises on running biomechanicsand lower limb functionality in long-distance runners. Methods: A randomized clinical trial was conducted involving long-distance runners of both sexes (35 ±7 years). Participants were allocated into two groups: experimental group (EG: n=19) and control group (CG: n=17). All participants underwent an assessment of running biomechanics and a functional test (Y Balance Test). Afterwards, the EG performed a series of eight foot core activation exercises while the CG received no intervention. Following a post-assessment was conducted for both groups. A two-way mixed ANOVA was applied with a 5% significance level. Results: No significant changes in running biomechanics were observed in the EG between pre and post intervention. However, the CG had an increased dorsiflexion peak and angle at initial contact. The Y Balance Test revealed significant improvements in the EG for the dominant limb following intervention, with increased composite score (p=0.014) and posterolateral reach (p=0.036). Conclusion: The acute intervention on foot core muscles did not change hips and knees running kinematics but increased dorsiflexion, suggesting potential utility as a targeted intervention to enhance dorsiflexion when desired. Additionally, this activation protocol improved lower limb functionality through Y Balance Test. Therefore, activating intrinsic foot muscles prior to physical exercise is an alternative to assist lower limbs stability in long-distance runners. [resumo fornecido pelo autor]