College of Nursing, University of South Carolina, Columbia, SC, USA.
Miriam Hospital and W. Alpert Medical School of Brown University, Providence, RI, USA.
Psychooncology. 2017 Nov;26(11):1907-1913. doi: 10.1002/pon.4255. Epub 2016 Sep 15.
Sedentary behavior is recognized as an independent risk factor for chronic diseases. Cancer survivors report high levels of sedentary behavior. In secondary analyses, we examined the effects of an exercise intervention on sedentary behavior (sitting time) among breast cancer survivors.
Seventy-six breast cancer survivors (mean age = 55.62 y, mean 1.1 y since diagnosis) were randomized to receive either a 12-week telephone-delivered exercise intervention from peer volunteers or a contact control condition. The intervention did not specifically address sitting time. Participants' sedentary behavior was assessed for 7 days at baseline, 12 weeks, and 24 weeks via self-report and objective measurement (accelerometer).
At baseline, our sample reported sitting for 7.75 hours/day (10.98 h/d by accelerometer data). Spearman rank correlations showed significant positive correlations at baseline between sitting time measured by self-report and accelerometer (ρ = 0.37; P = .002) in the entire sample. There were no significant changes over time within group nor were there any significant intervention effects on sitting time (self-report and objective) at 12 and 24 weeks (all P's > .05).
An exercise intervention that did not focus specifically on sitting time did not affect sedentary behavior among breast cancer survivors. Intervention components that specifically target sitting behavior are needed to reduce this risk behavior among survivors.
久坐行为被认为是慢性病的一个独立危险因素。癌症幸存者报告久坐行为水平较高。在二次分析中,我们研究了运动干预对乳腺癌幸存者久坐行为(久坐时间)的影响。
76 名乳腺癌幸存者(平均年龄 55.62 岁,诊断后平均 1.1 年)被随机分为接受来自同龄志愿者的 12 周电话传递运动干预组或接触对照组。该干预并未专门针对久坐时间。在基线、12 周和 24 周时,通过自我报告和客观测量(加速度计)评估参与者的久坐行为 7 天。
在基线时,我们的样本报告每天坐着 7.75 小时(根据加速度计数据为 10.98 小时/天)。在整个样本中,自我报告和加速度计测量的久坐时间在基线时呈显著正相关(ρ=0.37;P=0.002)。组内没有随时间的显著变化,也没有在 12 周和 24 周时对久坐时间(自我报告和客观)产生任何显著的干预效果(所有 P 值均>.05)。
不特别关注久坐时间的运动干预并不能改变乳腺癌幸存者的久坐行为。需要有专门针对久坐行为的干预措施来减少幸存者的这种危险行为。