PDF(Pubmed)
Abstract：
The static posture associated with continuous tablet use can lead to musculoskeletal disorders of the neck and upper extremities as well as respiratory function disorders. We hypothesized that 0-degree tablet placement (flat on a table) would affect ergonomic risks and respiratory function. Eighteen undergraduate students were divided into two groups (n = 9 per group). In the first group, the tablet was placed at a 0-degree angle, whereas in the second group, it was placed at a 40- to 55-degree angle on a student learning chair. The tablet was used continuously for 2 h for writing and internet use. Rapid upper-limb assessment (RULA), craniovertebral angle, and respiratory function were assessed. There was no significant difference in respiratory function, including forced expiratory volume in 1 s (FEV1), forced vital capacity (FVC), and FEV1/FVC, between the groups (p = 0.09) or within groups. However, there was a statistically significant between-group difference in RULA (p = 0.001), with the 0-degree group having a greater ergonomic risk. There were also significant within-group differences between pre- and posttest. The CV angle differed significantly between groups (p = 0.03), whereby the 0-degree group had poor posture, as well as within the 0-degree group (p = 0.039), though not within the 40- to 55-degree group (p = 0.067). Undergraduate students who place their tablets at a 0-degree angle face increased ergonomic risks and higher potential for developing musculoskeletal disorders and poor posture. Thus, elevating the tablet and instituting rest intervals may prevent or decrease the ergonomic risks among tablet users.
摘要：
与连续使用片剂相关的静态姿势可导致颈部和上肢的肌肉骨骼疾病以及呼吸功能障碍。我们假设0度平板放置（平放在桌子上）会影响人体工程学风险和呼吸功能。将18名本科生分为两组（每组n=9）。在第一组中,片剂以0度角放置，而在第二组中，它以40至55度角放置在学生学习椅上。平板电脑连续使用2小时用于书写和互联网使用。快速上肢评估（RULA），颅骨角度，并评估呼吸功能。呼吸功能无显著差异,包括1s用力呼气量（FEV1），强迫肺活量(FVC)，和FEV1/FVC，组间（p=0.09）或组内。然而,RULA的组间差异有统计学意义(p=0.001)，0度组的人体工程学风险更大。前测和后测之间也存在显着的组内差异。组间CV角有显著差异（p=0.03），0度组的姿势不好，以及在0度组中（p=0.039），虽然不在40到55度的组中（p=0.067）。以0度角放置平板电脑的本科生会增加人体工程学风险，并增加患肌肉骨骼疾病和不良姿势的可能性。因此，提升平板电脑和设置休息间隔可以防止或减少平板电脑用户的人体工程学风险。
