Instituto Politécnico de Setúbal, ESS, Estefanilha, Setúbal, Portugal.
Centro Interdisciplinar de Investigação Aplicada em Saúde, ESS, Instituto Politécnico de Setúbal, Estefanilha, Setúbal, Portugal.
J Back Musculoskelet Rehabil. 2023;36(3):721-729. doi: 10.3233/BMR-220188.
Gluteus medius (GM) is a segmented muscle involving three muscular subdivisions. Rehabilitation exercises has been suggested to strengthen specific subdivisions.
This study aimed to evaluate muscular activation of the anterior, middle, and posterior subdivisions of the GM during two different exercises.
A total of 28 healthy active subjects participated in this study. Muscle activity using surface electromyography was recorded for the three GM subdivisions during figure-of-four position (FFP) and wall press (WP). Non-parametric Kruskal-Wallis test was used to detect differences between GM subdivisions on each exercise and the Mann-Whitney U test was used to compare muscular activation across exercises.
There were statistically significant differences (P< 0.001) in all GM subdivision during FFP and WP exercises. Both exercises showed greater activation of the posterior subdivision than the middle and anterior subdivisions, with the WP causing highest activation of the posterior subdivision.
In line with the WP exercise, the FFP produces sufficient activity to provide potential strength gains on the posterior subdivision and could be a viable option to include in the early stages of the rehabilitation process. Clinicians may use this information to make more informed decisions about exercise selection for strengthening specific GM subdivision.
臀中肌（GM）是一块分段肌肉，由三个肌肉亚部组成。有研究建议通过康复训练来增强特定的亚部。
本研究旨在评估两种不同运动下 GM 的前、中、后亚部的肌肉激活情况。
共有 28 名健康、活跃的受试者参与了这项研究。在“四字征”（FFP）和“墙壁推压”（WP）两种姿势下，通过表面肌电图记录 GM 三个亚部的肌肉活动。采用非参数 Kruskal-Wallis 检验来检测每种运动下 GM 亚部之间的差异，并用曼-惠特尼 U 检验来比较不同运动下的肌肉激活情况。
在 FFP 和 WP 运动中，GM 的所有亚部均存在统计学上的显著差异（P<0.001）。两种运动都显示出后亚部的激活程度高于中、前亚部，而 WP 运动则引起了后亚部的最大激活。
与 WP 运动一致，FFP 运动可产生足够的活动度，从而在后亚部获得潜在的力量增益，这可能是康复过程早期的一个可行选择。临床医生可以利用这些信息，在选择针对特定 GM 亚部的强化运动时做出更明智的决策。
