Interface stability influences torso muscle recruitment and spinal load during pushing tasks.
Interface stability influences torso muscle recruitment and spinal load during pushing tasks.
复制标题
界面稳定性会影响推动任务期间的躯干肌肉募集和脊柱负荷。
DOI：
10.1080/00140130500485285
复制
发表时间：
2006
期刊：
影响因子：
2.4
通讯作者：
Granata,KP
中科院分区：
文献类型：
--
作者：
Lee,PJ;Granata,KP
Handle or interface design can influence torso muscle recruitment and spinal load during pushing tasks. The objective of the study was to provide insight into the role of interface stability with regard to torso muscle recruitment and biomechanical loads on the spine. Fourteen subjects generated voluntary isometric trunk flexion force against a rigid interface and similar flexion exertions against an unstable interface, which simulated handle design in a cart pushing task. Normalized electromyographic (EMG) activity in the rectus abdominus, external oblique and internal oblique muscles increased with exertion effort. When using the unstable interface, EMG activity in the internal and external oblique muscle groups was greater than when using the rigid interface. Results agreed with trends from a biomechanical model implemented to predict the muscle activation necessary to generate isometric pushing forces and maintain spinal stability when using the two different interface designs. The co-contraction contributed to increased spinal load when using the unstable interface. It was concluded that handle or interface design and stability may influence spinal load and associated risk of musculoskeletal injury during manual materials tasks that involve pushing exertions.
