J Sport Rehabil. 2020 May 5;30(2):255-260. doi: 10.1123/jsr.2018-0442.
Tasks that activate the lateral trunk muscles are clinically relevant in athletic and rehabilitation programs. However, no electromyography studies have compared tasks aimed at lateral trunk muscle activation.
To compare the activation magnitudes of the internal and external obliques between 4 tasks targeting recruitment of the lateral trunk muscles, including the proposal of a novel assessment.
Comparative laboratory study.
University-based biomechanics laboratory.
Sixty-three participants (35 females, age = 23.6 [2.0] y, height = 1.72 [0.10] m, mass = 70.7 [14.4] kg, body mass index = 23.6 [2.86] kg/m2).
INTERVENTION(S): Surface electromyography data were recorded bilaterally from the internal and external obliques while the participants performed 2 maximum voluntary contraction tasks followed by 4 isometric tasks. The isometric tasks included feet-elevated side-supported, trunk-elevated side-unsupported, lateral plank, and side-lying hip abduction.
Maximum voluntary contraction-normalized and integrated muscle activities were calculated for targeted and nontargeted muscles in each task. A side-by-task analysis of variance with Bonferroni correction was conducted.
The trunk-elevated side-unsupported task strongly activated the internal (199% maximum voluntary contraction) and external (103%) oblique muscles. The feet-elevated side-supported task strongly activated the internal obliques (205%) but not the external obliques (55%). The lateral plank task successfully activated the internal (107%) and external (72%) obliques, but not at the highest levels of the tested tasks. The side-lying hip abduction task was the least effective at activating either the internal (48%) or external (20%) obliques.
We recommend the novel trunk-elevated side-unsupported task for assessing lateral trunk muscle performance. For independent exercise, we recommend the lateral plank task, unless arm or shoulder pathologies are present, whereby the feet-elevated side-supported task may be favorable.
激活侧躯干肌肉的任务在运动和康复计划中具有重要的临床意义。然而，目前还没有肌电图研究比较旨在招募侧躯干肌肉的任务。
比较 4 种针对侧躯干肌肉募集的任务中内、外斜肌的激活程度，并提出一种新的评估方法。
对比实验室研究。
基于大学的生物力学实验室。
63 名参与者（35 名女性，年龄=23.6[2.0]岁，身高=1.72[0.10]m，体重=70.7[14.4]kg，体重指数=23.6[2.86]kg/m2）。
在参与者进行 2 项最大自主收缩任务后，记录双侧内、外斜肌的表面肌电图数据，随后进行 4 项等长任务。等长任务包括脚抬高侧支撑、躯干抬高侧无支撑、侧平板支撑和侧卧髋关节外展。
针对每个任务，计算目标和非目标肌肉的最大自主收缩归一化和积分肌电活动。采用双侧任务方差分析和 Bonferroni 校正进行分析。
躯干抬高侧无支撑任务强烈激活内斜肌（199%最大自主收缩）和外斜肌（103%）。脚抬高侧支撑任务强烈激活内斜肌（205%），但不激活外斜肌（55%）。侧平板支撑任务成功激活内斜肌（107%）和外斜肌（72%），但不是在测试任务中激活水平最高的任务。侧卧髋关节外展任务对内斜肌（48%）和外斜肌（20%）的激活效果最差。
我们推荐使用新型的躯干抬高侧无支撑任务来评估侧躯干肌肉的表现。对于独立运动，我们推荐使用侧平板支撑任务，除非存在手臂或肩部疾病，此时脚抬高侧支撑任务可能更有利。
