Department of Human Factors Engineering, Ulsan National Institute of Science and Technology, Ulsan, South Korea.
Department of Human Factors Engineering, Ulsan National Institute of Science and Technology, Ulsan, South Korea.
Appl Ergon. 2019 Nov;81:102884. doi: 10.1016/j.apergo.2019.102884. Epub 2019 Jun 28.
The objective of this study was to quantify head flexion when using a smartphone while walking. Head flexion angle in the sagittal plane was measured from twenty-eight young users when conducting one-handed web-browsing while walking, two-handed texting while walking, and walking upright on a 60-m walkway. Participants walked with the head flexed 38.5° (median angle) during the two-handed texting and it was significantly greater (p < 0.05) than that of the one-handed web-browsing (31.1°) as well as of upright walking (-1.2°). The study results indicated that using a smartphone while walking would pose a larger load to the neck musculature compared to when walking without using a phone, and the load would be greater for two-handed texting than for one-handed browsing among the two smartphone tasks. The findings of this study can be used to inform smartphone users of potential risks of smartphone use while walking.
本研究旨在量化使用智能手机时头部的前屈程度。研究测量了 28 名年轻使用者在进行单手浏览网页、双手发短信和在 60 米步行道上直立行走时头部在矢状面上的前屈角度。参与者在进行双手发短信时头部弯曲 38.5°（中位数角度），显著大于单手浏览网页（31.1°）和直立行走（-1.2°）时的角度（p<0.05）。研究结果表明，与不使用手机行走相比，行走时使用智能手机会对颈部肌肉造成更大的负荷，而在这两种智能手机任务中，双手发短信比单手浏览对颈部的负荷更大。本研究的结果可以告知智能手机用户在行走时使用智能手机的潜在风险。
