Cannon Jordan, Weithman Beverly A, Powers Christopher M
Jacquelin Perry Musculoskeletal Biomechanics Research Laboratory, Division of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles, CA, USA.
Jacquelin Perry Musculoskeletal Biomechanics Research Laboratory, Division of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles, CA, USA.
J Electromyogr Kinesiol. 2022 Apr;63:102643. doi: 10.1016/j.jelekin.2022.102643. Epub 2022 Feb 9.
Given its tri-planar action at the hip, strengthening of gluteus maximus (GMAX) has been advocated as part of rehabilitation and injury prevention protocols for various musculoskeletal conditions. However, recruitment of GMAX during weight-bearing strengthening exercises can be challenging owing to the muscular redundancy at the hip for a given joint motion. The current study sought to determine if a 1-week activation program could result in greater GMAX recruitment during functional strengthening exercises. Pre- and post-training surface electromyography were collected from 12 healthy participants as they performed double- and single-leg squats. Between testing sessions, participants completed a GMAX activation training program consisting of isometric exercises with band resistance (twice per day for 7 days). Following the 1-week activation program, GMAX recruitment was found to increase by 57% during the double-leg squat (p = 0.005, Cohen's r = 0.73) and 53% during the single-leg squat (p = 0.006, Cohen's r = 0.70). Implementation of an initial GMAX activation program should be considered to facilitate neuromuscular adaptations that facilitate utilization of GMAX during hip strengthening exercises.
鉴于臀大肌在髋关节处的三维作用，加强臀大肌（GMAX）已被提倡作为各种肌肉骨骼疾病康复和预防损伤方案的一部分。然而，由于在给定关节运动时髋关节处肌肉冗余，在负重强化训练中募集臀大肌可能具有挑战性。当前研究旨在确定为期1周的激活计划是否能在功能性强化训练中导致更多的臀大肌募集。在12名健康参与者进行双腿和单腿深蹲时，收集训练前后的表面肌电图。在测试阶段之间，参与者完成了一个臀大肌激活训练计划，该计划包括使用弹力带进行等长运动（每天两次，共7天）。在为期1周的激活计划之后，发现臀大肌募集在双腿深蹲时增加了57%（p = 0.005，科恩相关系数r = 0.73），在单腿深蹲时增加了53%（p = 0.006，科恩相关系数r = 0.70）。应考虑实施初始臀大肌激活计划，以促进神经肌肉适应，从而在髋关节强化训练中便于臀大肌的利用。
