Lin Jia-Hua, Bao Stephen
Safety and Health Assessment and Research for Prevention (SHARP) Program, Washington State Department of Labor and Industries, Olympia, WA, USA.
Work. 2019;64(3):563-568. doi: 10.3233/WOR-193017.
Sit-stand workstations have been introduced in the workplaces to address the adverse sedentary effect inherent to typical office jobs. Existing field or laboratory studies showed that standing interventions are not a detriment to work productivity or performance. The effect of gradient standing proportion on these measures is still unknown.
The current naturalistic pilot study aimed to examine the controlled sit-stand ratio effect on office performances.
Eleven musculoskeletal symptom free office employees from a large government agency volunteered in this study. They were all equipped with electronic sit-stand desks. Computer usage (N=11) and productivity (N=3) were collected using software and organizational metrics, respectively, for four typical workdays of four different sit-stand ratios (7 : 1, 3 : 1, 2 : 1, and 1 : 1).
There were no statistically significant schedule effects on any computer usage measures. While not significant, time using computer, keystrokes, word count, and keyboard errors were all less as standing time increased. Sit-stand ratio and job productivity did not observe a clear cause and effect relationship.
The amount of time spent standing in typical office jobs might not affect computer usage and productivity. Further study with a larger sample is needed for a stronger evidence.
为应对典型办公室工作中固有的久坐不良影响，工作场所引入了坐立两用工作站。现有的现场或实验室研究表明，站立干预对工作效率或表现并无不利影响。梯度站立比例对这些指标的影响仍不明确。
当前这项自然主义的初步研究旨在探讨可控的坐立比例对办公室工作表现的影响。
来自一家大型政府机构的11名无肌肉骨骼症状的办公室员工自愿参与本研究。他们都配备了电动坐立两用办公桌。在四个不同坐立比例（7∶1、3∶1、2∶1和1∶1）的四个典型工作日，分别使用软件和组织指标收集计算机使用情况（N = 11）和工作效率（N = 3）数据。
在任何计算机使用指标上均未观察到具有统计学意义的时间安排效应。虽然不显著，但随着站立时间增加，计算机使用时间、击键次数、字数和键盘错误均有所减少。坐立比例与工作效率之间未观察到明确的因果关系。
在典型办公室工作中站立的时间量可能不会影响计算机使用情况和工作效率。需要进行更大样本量的进一步研究以获得更有力的证据。
