Department of Human Nutrition, University of Otago, Dunedin, New Zealand.
J Occup Environ Med. 2018 Dec;60(12):1150-1157. doi: 10.1097/JOM.0000000000001467.
The aim of this study was to describe device-measured patterns of sedentary behavior in self-identified sedentary university employees.
Participants (n = 78) wore the ActiGraph GT3X+ and the activPAL3 for 7 days. Data from the ActiGraph were used to identify time in sedentary behavior, light-intensity, and moderate-to-vigorous physical activity. Data from the activPAL identified time sitting/lying, standing, and stepping. Breaks in sedentary time and prolonged sedentary bouts were described.
During workdays, participants spent 65% to 79% of time sedentary, 16% in light-intensity physical activity, and 4% in moderate-to-vigorous physical activity, 76% of time was spent sitting/lying, 16% standing, and 8% stepping. Between 10 and 12 breaks in sedentary time were accumulated.
Office-based university employees spend a high proportion of their time sedentary, but accumulate a high number of breaks. Whether these breaks are appropriate in timing, duration, and intensity to elicit health benefits seen in laboratory studies requires further investigation.
本研究旨在描述自我认定久坐的大学员工的设备测量久坐行为模式。
参与者（n=78）佩戴 ActiGraph GT3X+ 和 activPAL3 共 7 天。使用 ActiGraph 数据来识别久坐时间、低强度活动和中等到剧烈强度的体力活动时间。利用 activPAL 数据来确定坐/躺、站立和行走时间。描述久坐时间的中断和长时间久坐。
在工作日，参与者有 65%至 79%的时间处于久坐状态，16%的时间处于低强度体力活动，4%的时间处于中等到剧烈强度体力活动，76%的时间处于坐/躺状态，16%的时间处于站立状态，8%的时间处于行走状态。总共积累了 10 到 12 次久坐时间的中断。
以办公室为基础的大学员工大部分时间都处于久坐状态，但他们积累了大量的久坐中断时间。这些中断时间在时机、持续时间和强度方面是否足以产生实验室研究中观察到的健康益处，还需要进一步的研究。
