J Sport Rehabil. 2021 Dec 30;30(5):754-759. doi: 10.1123/jsr.2020-0031.
Side bridge exercises strengthen the hip, trunk, and abdominal muscles and challenge the trunk muscles without the high lumbar compression associated with trunk extension or curls. Previous research using electromyography (EMG) reports that performance of the side bridge exercise highly activates the gluteus medius (Gmed). However, to the best of our knowledge, no previous research has investigated EMG amplitude in the hip and trunk muscles during side bridge exercise in subjects with Gmed weakness.
The purpose of this study was to examine the EMG activity of the hip and trunk muscles during 3 variations of the side bridge exercise (side bridge, side bridge with knee flexion, and side bridge with knee flexion and hip abduction of the top leg) in subjects with Gmed weakness.
Repeated-measures experimental design.
Research laboratory.
Thirty subjects (15 females and 15 males) with Gmed weakness participated in this study.
Each subject performed 3 variations of the side bridge exercise in random order.
Surface EMG was used to measure the muscle activities of the rectus abdominis, external oblique, longissimus thoracis, multifidus, Gmed, gluteus maximus, and tensor fasciae latae (TFL), and Gmed/TFL muscle activity ratio during 3 variations of the side bridge exercise.
There were significant differences in Gmed (F2,56 = 110.054, P < .001), gluteus maximus (F2,56 = 36.416, P < .001), and TFL (F2,56 = 108.342, P < .001) muscles among the 3 side bridge exercises. There were significant differences in the Gmed/TFL muscle ratio (F2,56 = 20.738, P < .001).
Among 3 side bridge exercises, the side bridge with knee flexion may be effective for the individuals with Gmed weakness among 3 side bridge exercises to strengthen the gluteal muscles, considering the difficulty of the exercise and relative contribution of Gmed and TFL.
侧桥练习可以增强臀部、躯干和腹部肌肉，并挑战躯干肌肉，而不会像躯干伸展或卷曲那样导致腰椎高位压缩。以前使用肌电图（EMG）的研究报告称，侧桥练习高度激活臀中肌（Gmed）。然而，据我们所知，以前没有研究调查过 Gmed 无力受试者在侧桥练习中髋关节和躯干肌肉的 EMG 幅度。
本研究旨在研究 3 种侧桥练习（侧桥、侧桥加屈膝、侧桥加抬腿的髋关节外展）中 Gmed 无力受试者的髋关节和躯干肌肉的 EMG 活动。
重复测量实验设计。
研究实验室。
30 名 Gmed 无力患者（15 名女性和 15 名男性）参加了这项研究。
每位受试者以随机顺序进行 3 种侧桥练习。
使用表面肌电图测量 3 种侧桥练习中腹直肌、腹外斜肌、胸最长肌、多裂肌、Gmed、臀大肌和阔筋膜张肌（TFL）的肌肉活动以及 Gmed/TFL 肌肉活动比。
在 3 种侧桥练习中，Gmed（F2,56 = 110.054，P <.001）、臀大肌（F2,56 = 36.416，P <.001）和 TFL（F2,56 = 108.342，P <.001）肌肉之间存在显著差异。Gmed/TFL 肌肉比例（F2,56 = 20.738，P <.001）存在显著差异。
在 3 种侧桥练习中，考虑到练习的难度和 Gmed 和 TFL 的相对贡献，侧桥加屈膝可能对 Gmed 无力个体加强臀肌更有效。
