To maximize user experience in VR environments, optimizing the comfortability of head-mounted displays (HMDs) is essential. To date, few studies have investigated the fatigue induced by wearing commercially available HMDs. Here, we focus on the effects of HMD weight and balance on the physical load experienced by the user. We conducted an experiment in which participants completed a shooting game while wearing differently weighted and balanced HMDs. Afterwards, the participants completed questionnaires to assess levels of discomfort and fatigue. The results clarify that the weight of the HMD affects user fatigue, with the degree of fatigue varying depending on the center of mass position. Additionally, they suggest that the torque at the neck joint corresponds to the physical load imparted by the HMD. Therefore, our results provide valuable insights, demonstrating that, to improve HMD comfortability, it is necessary to consider both the balance and reduction of weight during HMD design.

中文翻译：

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头戴式显示器的重量和平衡对身体负荷的影响

为了最大限度地提高 VR 环境中的用户体验，优化头戴式显示器 (HMD) 的舒适度至关重要。迄今为止，很少有研究调查佩戴市售 HMD 引起的疲劳。在这里，我们关注 HMD 重量和平衡对用户所承受的身体负荷的影响。我们进行了一项实验，参与者在佩戴不同重量和平衡的 HMD 的情况下完成射击游戏。之后，参与者完成了问卷以评估不适和疲劳的程度。结果表明，HMD 的重量会影响用户疲劳，疲劳程度取决于质心位置。此外，他们建议颈部关节处的扭矩对应于 HMD 施加的物理负载。所以，