A history of low back pain affects pelvis and trunk coordination during a sustained manual materials handling task

作     者：Joseph F.Seay Shane G.Sauer Tejash Patel Tanja C.Roy 

作者机构：Military Performance Division US. Army Research Institute of Environmental Medicine Natick MA 01760 USA Biophysics ancl Biomedical Modelling Division US. Army Research Institute of Environmental Medicine Natick MA O1760 USA 

出 版 物：《Journal of Sport and Health Science》 (运动与健康科学（英文）)

年 卷 期：2016年第5卷第1期

页      面：52-60页

核心收录：

学科分类：1002[医学-临床医学] 100216[医学-运动医学] 10[医学] 

主　　题：Lifting Lowering Occupational biomechanics Relative phase Relative phase variability 

摘      要：Purpose:The purpose of this study was to compare the coordination between the trunk and the pelvis during a sustained asymmetric repetitive lifting task between a group with a history of low back pain(LBP;HBP) and a group with no history of LBP(NBP).Methods:Volunteers lifted a 11-kg box from ankle height in front to a shelf 45° off-center at waist height,and lowered it to the start position at12 cycles/min for 10 *** side was alternated during the *** relative phase was used to calculate coordination between the pelvis and trunk rotation at the beginning(Min 1),middle(Min 5),and end of the bout(Min 9).Results:While there were no main effects for group,a significant interaction between time and group indicated that,in the frontal plane,the NBP group coordination was more anti-phase toward the end of the bout,with no such differences for the HBP *** of sagittal-axial(bend and twist) coordination revealed the HBP group coordination was more in-phase at the end of the bout over the entire cycle and for the lifting phase alone,with no such differences for the NBP ***:Differences between groups demonstrate residual consequences of LBP in an occupational scenario,even though the HBP group was pain-free for 6 months prior to data *** in-phase coordination in the HBP group may represent a coordination pattern analogous to guarded gait which has been observed in other studies,and may lend insight as to why these individuals are at increased risk for re-injury.