Research Centre in Physical Activity, Health and Leisure (CIAFEL), Faculty of Sport, University of Porto, Porto, Portugal.
Department of Physical Education, Sport and Human Movement, Autonomous University of Madrid, Madrid, Spain.
Scand J Med Sci Sports. 2020 Apr;30(4):700-708. doi: 10.1111/sms.13612. Epub 2020 Jan 5.
This study aimed: (a) to provide a detailed description of sleep, sedentary behavior (SED), light physical activity (LPA), and moderate-to-vigorous physical activity (MVPA) over the complete 24-hours period using raw acceleration data in older adults; and (b) to examine the differences in the 24-hours activity cycle by sex, age, education, and body mass index (BMI).
Population-based cohort comprising 3273 community-dwelling individuals (1739 women), aged 71.8 ± 4.5 years, participating in the Seniors-ENRICA-2 study. Participants wore a wrist-worn ActiGraph GT9X accelerometer for 7 consecutive days, and the raw signal was processed using the R-package GGIR.
Participants reached 21.5 mg as mean acceleration over the whole day; 32.3% (7.7 h/d) of time was classified as sleep, 53.2% (12.7 h/d) as SED, 10.4% (148.6 min/d) as LPA, and 4.1% (59.0 min/d) as MVPA. No marked differences were found in sleep-related variables between socio-demographic and BMI groups. However, women showed higher LPA but lower SED and MVPA than men. Moreover, SED increased whereas LPA and MVPA decreased with age. Participants with obesity (BMI ≥ 30 kg/m ) accumulated more SED and less LPA and MVPA than those without obesity. As expected, adherence to physical activity recommendations varied widely (9.2%-76.6%) depending on the criterion of MVPA accumulation.
Objective assessment of the 24-hour activity cycle provides extensive characterization of daily activities distribution in older adults and may inform health-promotion interventions in this population. Women, the oldest old, and those with obesity offer relevant targets of strategies to improve lifestyle patterns.
本研究旨在：(a)使用原始加速数据详细描述老年人完整 24 小时内的睡眠、久坐行为 (SED)、低强度体力活动 (LPA) 和中高强度体力活动 (MVPA)；(b) 按性别、年龄、教育程度和体重指数 (BMI) 检查 24 小时活动周期的差异。
本研究纳入了参加 Seniors-ENRICA-2 研究的 3273 名社区居住的个体（1739 名女性），年龄为 71.8±4.5 岁，为基于人群的队列研究。参与者佩戴腕戴式 ActiGraph GT9X 加速度计连续 7 天，并使用 R 包 GGIR 处理原始信号。
参与者全天的平均加速度达到 21.5mg；32.3%（7.7h/d）的时间被归类为睡眠，53.2%（12.7h/d）为 SED，10.4%（148.6min/d）为 LPA，4.1%（59.0min/d）为 MVPA。在社会人口统计学和 BMI 组之间，睡眠相关变量没有明显差异。然而，女性的 LPA 较高，SED 和 MVPA 较低。此外，随着年龄的增长，SED 增加，而 LPA 和 MVPA 减少。肥胖者（BMI≥30kg/m ）的 SED 积累较多，LPA 和 MVPA 积累较少，而非肥胖者则相反。正如预期的那样，MVPA 积累的标准不同，对身体活动建议的依从性差异很大（9.2%-76.6%）。
客观评估 24 小时活动周期可广泛描述老年人的日常活动分布情况，并为该人群的健康促进干预措施提供信息。女性、最年长的老年人和肥胖者是改善生活方式模式策略的重要目标。
