Sedentary Bout Patterns
sedentary behavior, chronic disease
CHRONIC DISEASE
Categorized sedentary bout analyses revealed two key findings: (1) the treadmill desk resulted in fewer daily short-duration (ie, <20 min) sedentary bouts compared with the control and sit-to-stand desk groups after M12 (ie, approximately 4-5 less bouts/total day and approximately 2-4 less bouts/workday), and (2) the sit-to-stand desk resulted in fewer sedentary bouts of >60 minutes compared with the control and treadmill desk groups after M3 (ie, approximately 0.7 less bouts/workday) and after M6 and M12 (ie, approximately 0.7-1 less bouts/total day). Correspondingly, these patterns impacted usual sedentary bout durations such that (1) the treadmill desk group’s total daily usual sedentary bout duration was approximately 9 to 11 minutes longer compared with the control and sit-to-stand desk groups after M12, and (2) the sit-to-stand desk group’s total daily usual sedentary bout duration was approximately 10 minutes shorter than the control groups at M3, which, however, was not sustained through M12. Similar trends for workday usual sedentary bout durations were evident for both intervention groups. However, although the observed workday difference for usual sedentary bout was larger as compared with the total day, these trends were observed only after M3 for the sit-to-stand desk group (ie, approximately 20 min shorter than the control group) and after M6 for the treadmill desk group (ie, approximately 13.5 min longer than sit-to-stand desk group).The patterns of sedentary behavior bout accumulation observed in the sit-to-stand desk group were consistent with those reported in previous studies [This study is the first to report the impact of treadmill desks on both the distribution of sedentary bouts across temporal categories and usual sedentary bout duration, and the first to provide a head-to-head comparison of such metrics with sit-to-stand desks. An important finding is that treadmill desks exerted a variable response as compared with sit-to-stand desks by favoring the accumulation of sedentary behavior in prolonged bouts when the desk is not being used for walking or standing. This finding is noteworthy because prolonged sedentary behavior may be adversely associated with chronic disease risk factors and overall health [