Data underlying the publication "Comfort and discomfort during smartphone use on a bed".

People use a smartphone while sitting on the sofa, lying on a bed or riding on a train or an airplane. Using a smartphone for a long period could lead to musculoskeletal disorders mainly in the neck, upper and lower back, shoulders and arms. Not only are seats installed in vehicles, but beds are also in trains, airplanes and ships. This paper focuses on smartphone use on a bed. Such use is not preferable because the literature review showed that intraocular pressure is higher in the supine than in the sitting position (Vera et al., 2020), but in practice, people will use their smartphones in bed. In those cases, a good backrest angle is preferred. This is the topic of this chapter.

人们常于沙发落座、卧床休憩或搭乘火车、飞机时使用智能手机。长期使用智能手机可能引发肌肉骨骼疾病（musculoskeletal disorders），主要累及颈部、上下腰背、肩部及手臂。交通工具不仅配备座椅，火车、飞机与轮船亦设有卧床设施。本研究聚焦于卧床状态下的智能手机使用场景。此类使用方式并不推荐，因文献综述显示，仰卧位（supine）时的眼压（intraocular pressure）高于坐位（Vera等，2020），但现实中人们仍会卧床使用智能手机。在此类场景下，合适的靠背角度更为关键，这亦是本章的研究主题。