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The effects of target location on musculoskeletal load, task performance, and subjective discomfort during virtual reality interactions.
Applied Ergonomics ( IF 3.1 ) Pub Date : 2019-11-27 , DOI: 10.1016/j.apergo.2019.103010
Sai Akhil Penumudi 1 , Veera Aneesh Kuppam 1 , Jeong Ho Kim 2 , Jaejin Hwang 1
Affiliation  

The objective of this study was to evaluate the effect of different target locations on musculoskeletal loading and task performance during virtual reality (VR) interactions. A repeated-measures laboratory study with 20 participants (24.2 ± 1.5 years; 10 males) was conducted to compare biomechanical exposures (joint angle, moment, and muscle activity in the neck and shoulder), subjective discomfort, and task performance (speed and accuracy) during two VR tasks (omni-directional pointing and painting tasks) among different vertical target locations (ranged from 15° above to 30° below eye height). The results showed that neck flexion/extension angle and moment, shoulder flexion angle and moment, shoulder abduction angle, muscle activities of neck and shoulder muscles, and subjective discomfort in the neck and shoulder significantly varied by target locations (p's < 0.001). The target locations at 15° above and 30° below eye height demonstrated greater shoulder flexion (up to 52°), neck flexion moment (up to 2.7Nm), anterior deltoid muscle activity, and subjective discomfort in the neck and shoulder as compared to the other locations. This result indicates that excessive vertical target locations should be avoided to reduce musculoskeletal discomfort and injury risks during VR interactions. Based on relatively lower biomechanical exposures and trade-off between neck and shoulder postures, vertical target location between eye height and 15° below eye height could be recommended for VR use.

中文翻译:

在虚拟现实交互过程中,目标位置对肌肉骨骼负荷,任务执行和主观不适的影响。

这项研究的目的是评估虚拟现实(VR)交互过程中不同目标位置对肌肉骨骼负荷和任务执行的影响。进行了一项重复测量的实验室研究,共有20位参与者(24.2±1.5岁; 10位男性)进行了比较,以比较生物力学暴露(颈部和肩膀的关节角度,力矩和肌肉活动),主观不适和任务表现(速度和准确性) )在不同垂直目标位置(视线高度从15°到视线以下30°的范围)之间执行两个VR任务(全向指向和绘画任务)时。结果表明,颈部屈伸角度和力矩,肩屈角度和力矩,肩外展角度,颈部和肩膀肌肉的肌肉活动,颈部和肩膀的主观不适因目标位置而异(p's 0.001)。与眼睛高度相比,在高于和低于眼睛15°和30°处的目标位置显示出更大的肩膀屈曲(最大52°),脖子屈曲力矩(最大2.7Nm),前三角肌活动以及颈部和肩膀的主观不适感其他位置。该结果表明,应避免过多的垂直目标位置,以减少VR互动过程中的肌肉骨骼不适和受伤风险。基于相对较低的生物力学暴露以及颈部和肩膀姿势之间的权衡,建议将垂直目标位置设置在眼睛高度和眼睛高度以下15°之间。与眼睛高度相比,在高于和低于眼睛15°和30°处的目标位置显示出更大的肩膀屈曲(最大52°),脖子屈曲力矩(最大2.7Nm),前三角肌活动以及颈部和肩膀的主观不适感其他位置。该结果表明,应避免过多的垂直目标位置,以减少VR互动过程中的肌肉骨骼不适和受伤风险。基于相对较低的生物力学暴露以及颈部和肩膀姿势之间的权衡,建议将垂直目标位置设置在眼睛高度和眼睛高度以下15°之间。与眼睛高度相比,在高于和低于眼睛15°和30°处的目标位置显示出更大的肩膀屈曲(最大52°),脖子屈曲力矩(最大2.7Nm),前三角肌活动以及颈部和肩膀的主观不适感其他位置。该结果表明,应避免过多的垂直目标位置,以减少VR互动过程中的肌肉骨骼不适和受伤风险。基于相对较低的生物力学暴露以及颈部和肩膀姿势之间的权衡,建议将垂直目标位置设置在眼睛高度和眼睛高度以下15°之间。该结果表明,应避免过多的垂直目标位置,以减少VR互动过程中的肌肉骨骼不适和受伤风险。基于相对较低的生物力学暴露以及颈部和肩膀姿势之间的权衡,建议将垂直目标位置设置在眼睛高度和眼睛高度以下15°之间。该结果表明,应避免过多的垂直目标位置,以减少VR互动过程中的肌肉骨骼不适和受伤风险。基于相对较低的生物力学暴露以及颈部和肩膀姿势之间的权衡,建议将垂直目标位置设置在眼睛高度和眼睛高度以下15°之间。
更新日期:2019-11-01
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