Efeito de dois protocolos de fortalecimento para os membros inferiores em pacientes com dor patelofemoral: ensaio clínico aleatorizado

Abstract

Introduction: Patients with patellofemoral pain (PFP) evolve with weakness the hip stabilizer muscles. Hip and quadriceps strengthening have shown positive results in treatment for PFP. The aim of this study was to compare the effects the hip posterolateral complex strengthening with the hip anteromedial complex strengthening associated with quadriceps strengthening in the pain reduction and improvement of functional capacity in patients with PFP. Methods: Randomized clinical trial was performed, where 25 women with PFP were treated and evaluated. The participants were divided into two intervention groups, exercises group for the hip posterolateral complex (GPL) or exercises group for the hip anteromedial complex (GAM). Numerical pain scale, global effect perception scale, anterior knee pain scale, pain intensity and measured the frontal plane projection angle of the knee during the execution of the step down test and the muscle strength of the hip abductors, adductors, external and internal rotators were used as outcome measures. The difference between the groups was calculated by means of mixed linear models with level of α=5%. Results: Pain reduction, improvement of functional capacity and increase of muscular strength except for external rotators, were observed when evaluated after the therapy, with no difference between groups, only on the adductors strength. No significant differences were observed for the other outcomes. Conclusion: The two interventions proved to be effective in the pain reduction and improvement of functional capacity after 6 weeks of intervention, there was no difference between the two groups.