Faculty of Rehabilitation Medicine, University of Alberta, 3-48 Corbett Hall, 8205 114 Street, Edmonton T6G 2G4, Alberta, Canada.
Faculty of Rehabilitation Medicine, University of Alberta, 3-48 Corbett Hall, 8205 114 Street, Edmonton T6G 2G4, Alberta, Canada.
Heart Lung. 2019 Jan;48(1):8-12. doi: 10.1016/j.hrtlng.2018.09.008. Epub 2018 Oct 24.
There is a deleterious association between sedentary behavior and mortality risk factors. Elevated sedentary time has been reported in several studies that involved cardiac rehabilitation (CR) participants.
To examine the changes in sedentary behavior, breaks in sedentary time, and physical activity (PA) in CR participants.
This was a prospective repeated measures study. Sedentary behavior and PA were assessed using accelerometer at baseline, 12 weeks, and 6 months after CR entry.
At 12 weeks, participants (n = 58) spent more time in moderate-vigorous PA (MVPA) and tended to be less sedentary. However, the changes were lost by 6 month follow-up. Although the majority of participants met the recommended MVPA, our participants demonstrated elevated sedentary time. We found a strong positive correlation between time in light PA and number of breaks in sedentary time; neither of which showed any changes over time.
By promoting MVPA as their main target, current CR programs may have little impact on changing the elevated sedentary behavior of their participants. Further, interrupting sedentary time with light PA could be an achievable strategy to reduce sedentary behavior in CR participants.
久坐行为与死亡风险因素之间存在有害关联。在涉及心脏康复（CR）参与者的几项研究中，已经报道了久坐时间的增加。
研究 CR 参与者久坐行为、久坐时间中断和身体活动（PA）的变化。
这是一项前瞻性重复测量研究。在 CR 开始时、12 周和 6 个月时，使用加速度计评估久坐行为和 PA。
在 12 周时，参与者（n=58）在中等至剧烈强度 PA（MVPA）中花费的时间更多，并且倾向于久坐时间减少。然而，这些变化在 6 个月的随访中消失了。尽管大多数参与者达到了推荐的 MVPA，但我们的参与者表现出较高的久坐时间。我们发现，轻 PA 时间与久坐时间中断次数之间存在强烈的正相关；两者在时间上均没有变化。
通过将 MVPA 作为主要目标，当前的 CR 计划可能对改变参与者久坐行为的增加影响不大。此外，用轻 PA 打断久坐时间可能是减少 CR 参与者久坐行为的一种可行策略。
