Influência da rotação lateral da tibia sobre o recrutamento neuromuscular do VMO e VL durante a extensão do joelho

• Autor(a) principal: Menezes, Bárbara Fernandes de
• Data de Publicação: 2016
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UFRN
• Texto Completo: https://repositorio.ufrn.br/handle/123456789/35839
• topic: eletromiografia; quadríceps; exercício; electromyography; quadriceps; exercise.

Introduction: The Vastus Medialis Oblique (VMO) is considered one of the most important stabilizers of the patella, and exercises that prioritize its selective activation could reduce pain in patients with Patellofemoral Pain Syndrome (PFPS), as such as accelerate recovery after knee surgery. However, there is no consensus in the literature if any exercise would be selective for VMO activation in rehabilitation programs. Objective: To evaluate, through surface electromyography, whether lateral rotation of the tibia increases the recruitment of the VMO. Methods: This was a cross-sectional observational study in which 30 physically active women (mean age 21.6 ± 2.27 years and BMI of 22.57 ± 2.86 kg / m2) were submitted to a series of eight isometric exercises previously randomized, being four of them in Open Kinetic Chain (OKC), performed in an isokinetic dynamometer, and four in Closed Kinetic Chain (CKC), performed in a hack machine, varying between neutral and lateral rotation of the tibia. All the volunteers were submitted to the evaluation of the electromyographic activity by VMO / VL ratio during the eight exercises. Data were analyzed using SPSS 20.0 software, with a significance level of 5%. Results: Lateral rotation of the tibia increased the VMO / VL ratio in the OKC exercises in both the 30º (p = 0.025) and the 60º (p = 0.035) angles, but these results were not found in the CKC exercises. Conclusion: Lateral rotation of the tibia increases the VMO / VL ratio in the exercises in OKC.