Greig Michael, Wells Richard
Department of Kinesiology, University of Waterloo, ON, Canada.
Ergonomics. 2008 Aug;51(8):1238-57. doi: 10.1080/00140130802037289.
The purpose of this study was to systematically explore and describe the response of selected hand and forearm muscles during a wide range of static force and moment exertions. Twenty individuals with manual work experience performed exertions in power grip, pulp pinch and lateral pinch grips. Electromyography (EMG) from eight sites of the hand and forearm, grip force as well as ratings of perceived exertion (RPE) were monitored as each participant exerted approximately 350 short (5 s) static grip forces and external forces and moments. As expected, strong relationships were found between grip force alone without other actions and muscle activation. When the hand was used to grip and transmit forces and moments to the environment, the relationships between grip force and muscle activation were much weaker. Using grip force as a surrogate for forearm and hand tissue loading may therefore be misleading.
本研究的目的是系统地探索和描述在广泛的静态力和力矩施加过程中，选定的手部和前臂肌肉的反应。20名有体力劳动经验的个体进行了强力握、指尖捏和侧捏握力动作。在每位参与者施加约350次短暂（5秒）的静态握力、外力和力矩时，监测手部和前臂八个部位的肌电图（EMG）、握力以及主观用力程度（RPE）评级。正如预期的那样，在没有其他动作的情况下，仅握力与肌肉激活之间存在很强的相关性。当手部用于握持并向环境传递力和力矩时，握力与肌肉激活之间的相关性要弱得多。因此，使用握力作为前臂和手部组织负荷的替代指标可能会产生误导。
