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Relationships between observational estimates and physical measurements of upper limb activity

机译：上肢活动的观察估计与物理测量之间的关系

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摘要

This study examined the internal validity of observational-based ergonomic job analysis methods for assessing upper limb force exertion and repetitive motion. Six manual tasks were performed by multiple 'workers' while direct measurements were made to quantify force exertion and kinematics of the upper limb. Observational-based analyses of force and upper limb motion/repetition were conducted by 29 professional ergonomists. These analysts overestimated the magnitude of individual force exertions - temporal aspects of force exertion (duty cycle) were estimated more accurately. Estimates of the relative severity of repetitive motions among the jobs were accurate. Absolute counts of repetitive motions were less accurate. Modest correlations (r~2 = 0.28 to r~2 = 0.50) were observed between ratings of hand activity level and measured joint velocities. Ergonomic job analyses relying on systematic observation should be applied and interpreted with consideration given to the capabilities and limitations of analysts in estimating the physical risk factors. These findings are relevant to a better understanding of the internal validity of ergonomic job analysis methods based on systematic observation.
机译：本研究检查了基于观察的人体工程学工作分析方法在评估上肢力量施加和重复运动方面的内部有效性。由多个“工人”执行六项手动任务，同时直接进行测量以量化上肢的力量施加和运动学。 29位专业的人机工程学专家对力和上肢运动/重复进行了基于观察的分析。这些分析人员高估了个体用力的大小-估计了用力的时间方面（占空比）更准确。作业之间重复动作的相对严重性的估计是准确的。重复动作的绝对计数不太准确。在手活动水平的等级与测得的关节速度之间观察到适度的相关性（r〜2 = 0.28至r〜2 = 0.50）。依靠系统观察进行人机工程学工作分析时，应考虑到分析人员估算物理危险因素的能力和局限性，进行应用和解释。这些发现与更好地了解基于系统观察的人机工程学工作分析方法的内部有效性有关。

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  • 来源
    《Ergonomics》 |2009年第5期|569-583|共15页
  • 作者

    Brian D. Lowe; Edward F. Krieg;

  • 作者单位

    National Institute for Occupational Safety and Health, 4676 Columbia Parkway, MS C-24, Cincinnati, OH 45226, USA;

    National Institute for Occupational Safety and Health, 4676 Columbia Parkway, MS C-24, Cincinnati, OH 45226, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    repetition; force exertion; WMSD risk factors; upper limb;

    机译：重复;用力WMSD危险因素;上肢;

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