Rosenberg Dori E, Gell Nancy M, Jones Salene M W, Renz Anne, Kerr Jacqueline, Gardiner Paul A, Arterburn David
Group Health Research Institute, Seattle, WA, USA
Group Health Research Institute, Seattle, WA, USA.
Health Educ Behav. 2015 Oct;42(5):669-76. doi: 10.1177/1090198115577378. Epub 2015 Mar 20.
Overweight and obese older adults have high sedentary time. We tested the feasibility and preliminary effects of a sedentary time reduction intervention among adults over age 60 with a body mass index over 27 kg/m2 using a nonrandomized one-arm design.
Participants (N = 25, mean age = 71.4, mean body mass index = 34) completed an 8-week theory-based intervention targeting reduced total sitting time and increased sit-to-stand transitions. An inclinometer (activPAL) measured the primary outcomes, change in total sitting time and sit-to-stand transitions. Secondary outcomes included physical activity (ActiGraph GT3X+ accelerometer), self-reported sedentary behaviors, physical function (Short Physical Performance Battery), depressive symptoms (8-item Patient Health Questionnaire), quality of life (PROMIS), and study satisfaction. Paired t tests examined pre-post test changes in sitting time, sit-to-stand transitions, and secondary outcomes.
Inclinometer measured sitting time decreased by 27 min/day (p < .05) and sit-to-stand transitions increased by 2 per day (p > .05), while standing time increased by 25 min/day (p < .05). Accelerometer measured sedentary time, light-intensity, and moderate-to-vigorous physical activity improved (all p values ≤ .05). Self-reported sitting time, gait speed, and depressive symptoms also improved (all p values < .05). Effect sizes were small. Study satisfaction was high.
Reducing sitting time is feasible, and the intervention shows preliminary evidence of effectiveness among older adults with overweight and obesity. Randomized trials of sedentary behavior reduction in overweight and obese older adults, most of whom have multiple chronic conditions, may be promising.
超重和肥胖的老年人久坐时间较长。我们采用非随机单组设计，对60岁以上、体重指数超过27kg/m²的成年人进行了一项减少久坐时间干预措施的可行性及初步效果测试。
参与者（N = 25，平均年龄 = 71.4，平均体重指数 = 34）完成了一项为期8周的基于理论的干预，目标是减少总久坐时间并增加从坐姿到站姿的转换次数。使用倾角仪（activPAL）测量主要结局，即总久坐时间和从坐姿到站姿转换次数的变化。次要结局包括身体活动（ActiGraph GT3X+加速度计）、自我报告的久坐行为、身体功能（简短身体性能测试）、抑郁症状（8项患者健康问卷）、生活质量（PROMIS）和研究满意度。配对t检验用于检验久坐时间、从坐姿到站姿转换次数及次要结局在干预前后的变化。
倾角仪测量的久坐时间每天减少27分钟（p <.05），从坐姿到站姿的转换次数每天增加2次（p >.05），而站立时间每天增加25分钟（p <.05）。加速度计测量的久坐时间、轻度身体活动和中度至剧烈身体活动均有所改善（所有p值≤.05）。自我报告的久坐时间、步速和抑郁症状也有所改善（所有p值<.05）。效应量较小。研究满意度较高。
减少久坐时间是可行的，该干预措施在超重和肥胖的老年人中显示出初步的有效性证据。对超重和肥胖的老年人（其中大多数患有多种慢性病）进行减少久坐行为的随机试验可能很有前景。
