Associations between objectively measured physical activity, sedentary behaviour and time in bed among 75+ community-dwelling Danish older adults.
Associations between objectively measured physical activity, sedentary behaviour and time in bed among 75+ community-dwelling Danish older adults.
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DOI：
10.1186/s12877-020-01856-6
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发表时间：
2021-01-14
期刊：
影响因子：
4.1
通讯作者：
Caserotti P
中科院分区：
文献类型：
--
作者：
Tsai LT;Boyle E;Brønd JC;Kock G;Skjødt M;Hvid LG;Caserotti P
建议老年人每天睡7-8小时。在床上的时间（TIB）不同于睡眠持续时间，也包括躺在床上不睡觉的时间。长TIB（≥9小时）与自我报告的久坐行为相关，但客观测量的体力活动，久坐行为和TIB之间的关联尚不清楚。这项研究是基于健康老龄化能力网络（HANC研究）的横截面分析。通过放置在优势手腕上的三轴加速度计（ActiGraph）测量身体活动和久坐行为7天。久坐行为被分类为矢量幅度< 2303计数/分钟（cpm），体力活动强度被分类为矢量幅度2303-4999和≥ 5000 cpm。TIB记录在自我报告的日记中。参与者被分类为UTIB（通常TIB 7-9小时/夜：≥80%的测量日），STIB（有时TIB 7-9小时/夜：20- 7 - 9%的测量日）和RTIB（很少TIB 7-9小时/夜：< 20%的测量日）。以UTIB为参照组，通过每日体力活动水平和SB，采用多项回归模型计算RTIB和STIB的相对风险比（RRR）。模型根据年龄、性别、平均每日午睡时间和身体功能进行调整。纳入了341名老年人（中位年龄81（IQR 5），62%为女性），中位TIB为8小时21分钟（1小时10分钟）/天，体力活动水平为2054（864）CPM，64（15）%的清醒时间为久坐行为。与平均CPM最低三分位数内的那些相比，平均CPM在最高三分位数内的那些具有较低的RR（0.33（0.15-0.71），p = 0.005）。强度为2303-4999和≥ 5000 cpm/天的累积体力活动不会影响RTIB的RRR。高度久坐的参与者（久坐行为≥10小时/天）中RTIB的RR是久坐较少的参与者的三倍多（3.21（1.50-6.88），p = 0.003）。对于老年人，身体活动和久坐不动与大多数夜晚（≥80%）每晚卧床7-9小时有关。未来的纵向研究有必要探讨身体活动和睡眠时间之间的因果关系。
Older adults are recommended to sleep 7–8 h/day. Time in bed (TIB) differs from sleep duration and includes also the time of lying in bed without sleeping. Long TIB (≥9 h) are associated with self-reported sedentary behavior, but the association between objectively measured physical activity, sedentary behavior and TIB is unknown. This study was based on cross-sectional analysis of the Healthy Ageing Network of Competence (HANC Study). Physical activity and sedentary behaviour were measured by a tri-axial accelerometer (ActiGraph) placed on the dominant wrist for 7 days. Sedentary behavior was classified as < 2303 counts per minute (cpm) in vector magnitude and physical activity intensities were categorized, as 2303–4999 and ≥ 5000 cpm in vector magnitude. TIB was recorded in self-reported diaries. Participants were categorized as UTIB (usually having TIB 7–9 h/night: ≥80% of measurement days), STIB (sometimes having TIB 7–9 h/night: 20–79% of measurement days), and RTIB (rarely having TIB 7–9 h/night: < 20% of measurement days). Multinominal regression models were used to calculate the relative risk ratios (RRR) of being RTIB and STIB by daily levels of physical activity and SB, with UTIB as the reference group. The models were adjusted for age, sex, average daily nap length and physical function. Three hundred and fourty-one older adults (median age 81 (IQR 5), 62% women) were included with median TIB of 8 h 21 min (1 h 10 min)/day, physical activity level of 2054 (864) CPM with 64 (15) % of waking hours in sedentary behavior. Those with average CPM within the highest tertile had a lower RRR (0.33 (0.15–0.71), p = 0.005) for being RTIB compared to those within the lowest tertile of average CPM. Accumulating physical activity in intensities 2303–4999 and ≥ 5000 cpm/day did not affect the RRR of being RTIB. RRR of being RTIB among highly sedentary participants (≥10 h/day of sedentary behavior) more than tripled compared to those who were less sedentary (3.21 (1.50–6.88), p = 0.003). For older adults, being physically active and less sedentary was associated with being in bed for 7–9 h/night for most nights (≥80%). Future longitudinal studies are warranted to explore the causal relationship sbetween physical activity and sleep duration.
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影响因子：
3
作者：
Holfeld, Brett;Ruthig, Joelle C.
通讯作者：
Ruthig, Joelle C.
影响因子：
5.6
作者：
Ohayon, MM;Carskadon, MA;Vitiello, MV
通讯作者：
Vitiello, MV
影响因子：
4.8
作者：
de Castro Toledo Guimaraes, Laz Helena;Coin de Carvalho, Luciane Bizarl;do Prado, Gilmar Fernandes
通讯作者：
do Prado, Gilmar Fernandes
影响因子：
4.1
作者：
Hirshkowitz, Max;Whiton, Kaitlyn;Hillard, Paula J. Adams
通讯作者：
Hillard, Paula J. Adams
DOI：
10.1186/1479-5868-10-51
发表时间：
2013-04-25
期刊：
The international journal of behavioral nutrition and physical activity
影响因子：
--
作者：
Cain KL;Conway TL;Adams MA;Husak LE;Sallis JF
通讯作者：
Sallis JF