The effect of industrial back belts and breathing technique on trunk and pelvic coordination during a lifting task
The effect of industrial back belts and breathing technique on trunk and pelvic coordination during a lifting task
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DOI：
10.1097/00007632-199906010-00012
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发表时间：
1999-06-01
期刊：
影响因子：
3
通讯作者：
Hsiang, SM
中科院分区：
文献类型：
--
作者：
McGorry, RW;Hsiang, SM
研究设计.相对相位角被用来研究在一个升降任务中的节段性运动模式。研究背带、呼吸技术及其相互作用对腰椎和骨盆运动模式的影响。背景资料摘要。躯干和骨盆协调已在健康和腰痛人群中进行了研究。背带已被证明可以改变运动范围和腹内压。关于提升和降低过程中的安全带和协调的报道很少。相位角已被用于量化节段协调。六个人进行升降任务，23公斤的负荷下弹性，刚性，没有带的条件。在第二次会议期间，个人接受瓦尔萨尔瓦动作的训练，并重复该方案。采用电影摄影技术追踪躯干和骨盆的移位情况。在降低节段协调一般被认为是相反的升降机。由于腰带使用和呼吸的相互作用，在提升的初始阶段，发现腰椎和骨盆相位角之间的关系存在显着差异。腰椎活动范围明显减少与安全带的使用，在升降。骨盆活动度无明显变化。背带的使用和呼吸技术在提升的初始阶段相互作用，以显着改变腰椎和骨盆相位角。节段性运动学的变化与先前报道的有腰痛病史的患者相似。腰椎活动范围显着减少与安全带的使用，在升降。
Study Design. Relative phase angle was used to study segmental motion patterns during a lifting and lowering task.Objectives. To investigate the effect of back belts, breathing technique, and their interaction on lumbar and pelvic motion patterns.Summary of Background Data. Trunk and pelvic coordination has been investigated in healthy and low back pain populations. Back belts have been shown to alter range of motion and intra-abdominal pressure. Little has been reported about belts and coordination during lifting and lowering. Phase angle has been used for quantifying segmental coordination.Methods. Six individuals performed lifting/lowering tasks with a 23-kg load under elastic, rigid, and no belt conditions. During a second session, individuals were trained in Valsalva's maneuver and repeated the protocol. Cinematography was used to track trunk and pelvis displacements.Results. Segmental coordination during lowering generally was found to be the inverse of lifting. Significant differences in the relation between lumbar and pelvis phase angles were found during the initial stage of lifting because of the interaction of belt use and breathing. Lumbar range of motion decreased significantly with belt use during lifting and lowering. No significant change in pelvis range of motion was observed.Conclusions. Back belt use and breathing technique interacted during the initial stage of lifting to significantly alter the lumbar and pelvis phase angles. The change in segmental kinematics was similar to that previously reported for patients with a history of low back pain. Lumbar range of motion significantly decreased with belt use during both lifting and lowering.