Physical Therapy Program, Department of Rehabilitation Sciences, School of Allied Health Sciences, Texas Tech University Health Science Center, 1400 Coulter Street, Amarillo, TX 79106, USA.
PM R. 2010 Mar;2(3):187-94; quiz 226. doi: 10.1016/j.pmrj.2010.01.015.
The purpose of this study was to examine an individual's ability to produce an increase in transversus abdominis (TrA) thickness during the performance of a functional task with the use of the abdominal drawing-in maneuver (ADIM).
Within-subject repeated measures analysis of variance was used to examine the effects of the ADIM and a loaded forward-reaching activity on the dependent variable of TrA thickness.
Laboratory.
Convenience sample of 8 women and 8 men, asymptomatic, with a mean age of 27.6 +/- 7.1 years.
Ultrasound imaging measurements were recorded during 4 conditions: (1) while the patient was standing without the ADIM; (2) while the patient was standing with the ADIM; (3) during a loaded forward-reaching activity without the ADIM; and (4) during a loaded forward-reaching activity with the ADIM.
Thickness of the TrA muscle.
The measurement obtained by an investigator blinded to the condition revealed statistically significant differences in the thickness of the TrA between all uncontracted conditions as compared with all contracted conditions. No statistically significant difference in the thickness of the TrA in the contracted states during quiet standing versus loaded forward reach was observed.
Subjects in this study demonstrated the ability to voluntarily activate the TrA during upright static and functional tasks. Additionally, the TrA thickness may change in a direction-specific manner. These findings support a protective role of the ADIM during functional activity and may add information to ways for promoting low back pain prevention. Future studies should include the effectiveness in the use of ADIM during functional tasks for the prevention of low back pain.
本研究旨在检验个体在使用腹部收缩动作（ADIM）进行功能性任务时增加腹横肌（TrA）厚度的能力。
采用受试者内重复测量方差分析，考察 ADIM 和负重前伸活动对 TrA 厚度的影响。
实验室。
8 名女性和 8 名男性，无明显症状，平均年龄 27.6±7.1 岁。
在 4 种情况下记录超声成像测量结果：（1）患者站立时不使用 ADIM；（2）患者站立时使用 ADIM；（3）进行负重前伸活动时不使用 ADIM；（4）进行负重前伸活动时使用 ADIM。
TrA 肌肉厚度。
一位对条件不知情的研究者进行的测量显示，与所有收缩状态相比，所有未收缩状态下 TrA 的厚度存在统计学显著差异。在静立和负重前伸状态下，收缩状态下的 TrA 厚度在静立和负重前伸状态下没有统计学显著差异。
本研究中的受试者表现出在直立静态和功能性任务中主动激活 TrA 的能力。此外，TrA 厚度可能会以特定方向的方式发生变化。这些发现支持 ADIM 在功能性活动中的保护作用，并可能为促进腰痛预防提供更多信息。未来的研究应包括在预防腰痛的功能性任务中使用 ADIM 的有效性。
