Perturbation-enhanced neuromuscular training alters muscle activity in female athletes

摘要: Female athletes involved in jumping and cutting sports injure their anterior cruciate ligaments (ACL) 4–6 times more frequently than male counterparts comparable sports. Neuromuscular factors, including quadriceps dominance, has been incriminated as contributing to the higher rates of injury women. Currently, most effective form intervention developed reduce female ACL neuromuscular training. The purpose this study was (1) identify gender based muscle activity patterns during disturbed walking that may contribute injury, (2) determine if a novel training program could positively influence among healthy utilizing gait paradigm. Twenty (female=10, male=10) were tested. All subjects participated five trials which platform translated horizontally lateral direction at heel contact before after completing ten sessions perturbation program. Electromyographic (EMG) data from vastus lateralis, medial hamstrings, gastrocnemius collected. Trials analyzed for onset, termination activity, peak amplitude, time integrated EMG activity. Muscle cocontraction, simultaneous activation antagonistic muscles (lateral hamstrings-vastus gastrocnemius-vastus lateralis), calculated indicators active knee stiffness preparation strike, weight acceptance midstance. Prior training, women had significantly midstance men. Both hamstring integrals increased pre posttraining. Onset activities hamstrings similar except occurred strike Time moved just Women lateralis cocontraction indices preparatory phases men athletic our sample demonstrated characteristic dominance decreased when compared athletes. Modulation timing agonist musculature (hamstrings gastrocnemius) resulted normal quadriceps-hamstring balance stiffness. These alterations risk biomechanical strain high population.