Effects of fatigue on lower limb, pelvis and trunk kinematics and muscle activation: Gender differences

Author(s)

Lessi, Giovanna Camparis ; dos Santos, Ana Flavia ; Batista, Luis Fylipe ; de Oliveira, Gabriela Clemente ; Serrao, Fabio Viadanna

• Document type: Journal article
• Source: JOURNAL OF ELECTROMYOGRAPHY AND KINESIOLOGY; v. 32, p. 9-14, FEB 2017.
• Web of Science Citations: 10

Abstract

Background: Muscle fatigue is associated with biomechanical changes that may lead to anterior cruciate ligament (ACL) injuries. Alterations in trunk and pelvis kinematics may also be involved in ACL injury. Although some studies have compared the effects of muscle fatigue on lower limb kinematics between men and women, little is known about its effects on pelvis and trunk kinematics. The aim of the study was to compare the effects of fatigue on lower limb, pelvis and trunk kinematics and muscle activation between men and women during landing. Methods: The participants included forty healthy subjects. We performed kinematic analysis of the trunk, pelvis, hip and knee and muscle activation analysis of the gluteal muscles, vastus lateralis and biceps femoris, during a single-leg landing before and after fatigue. Results: Men had greater trunk flexion than women after fatigue. After fatigue, a decrease in peak knee flexion and an increase in Gmax and BF activation were observed. Conclusion: The increase in the trunk flexion can decrease the anterior tibiofemoral shear force resulted from the lower knee flexion angle, thereby decreasing the stress on the ACL. (C) 2016 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 14/10506-1 - Muscle strength and biomechanics of the lower limb and trunk during stop-jump in subjects with and without patellar tendinopathy
• Grantee: Fábio Viadanna Serrão
• Support Opportunities: Regular Research Grants