| Summary: | 碩士 === 長庚大學 === 復健科學研究所 === 92 === Background: Lifting is one of the major causes of low back pain (LBP). Patients with LBP have been reported higher trunk reposition errors (RE) than healthy subjects do. Yet, how weight holding affects trunk RE has not been explored during lifting. The purpose of this study is to explore the effect of weight holding on trunk RE in patients with LBP in the directions of trunk flexion and extension. Method: RE of the trunk motions in the sagittal plane were tested in twenty subjects with chronic LBP and 20 controls. During this study 20% of their maximal lifting capacity (MLC), determined by one RM of dynamic lifting was used as the weight held. Trunk position RE was calculated as the difference between the actual and replicated target position measured by Measurand ShapeTapeTM in direction of flexion and extension during weight holding. The dependent variables ware the absolute reposition error (ARE) and constant reposition error (CRE). Results: Factors of the holding weight and group affected the trunk ARE (F=7.06, p=0.011). The trunk ARE of subjects with chronic LBP was significant difference between conditions of loading and unloading (p=0.018). During unloading, the trunk ARE was significant difference in both groups (p<0.05). The direction of motion, lowering and lifting, affected the trunk CRE in control and chronic LBP group respective in (p<0.05; p=0.007). Conclusion: Patients with chronic LBP had a larger trunk ARE than healthy individuals did. Loading would decrease the trunk ARE in patients with chronic LBP but would not affect the ARE in the control group. Trunk CRE was affected by the direction of motion in both groups.
|
|---|
