Trajectories of objectively measured physical activity in free-living older men.
Trajectories of objectively measured physical activity in free-living older men.
复制标题
DOI：
10.1249/mss.0000000000000410
复制
发表时间：
2015-02
影响因子：
4.1
通讯作者：
Whincup PH
中科院分区：
文献类型：
--
作者：
Jefferis BJ;Sartini C;Ash S;Lennon LT;Wannamethee SG;Lee IM;Whincup PH
补充数字内容可在文本中找到。最年长的老人身体活动（PA）的急剧下降还没有得到很好的理解;关于老年人PA和久坐行为（SB）变化模式的信息很少。客观测量的PA数据的纵向数据可以提供关于PA和SB如何随年龄变化的见解。来自英国人群队列的70-90岁男性，每年在髋关节上佩戴GT 3X加速计，最多三次（56%、50%和51%响应率），持续2年。使用多水平模型估计活性变化。根据在两个或三个时间点≥10 min（现行指南）的发作中达到≥150 min·wk−1的MVPA对男性进行分组。共有1419名非卧床男性在≥2个时间点的≥3 d配戴时间≥600 min。在基线时，男性每天走4806步，一天中有72.5%的时间在SB，23.1%在轻度PA，4.1%在中度到剧烈PA（MVPA）。每年的平均变化为-341步，+1.1%SB，-0.7%light PA和-0.4%MVPA（所有P < 0.001）。共有76.3%（n = 1083）从未符合指南（“稳定低”），7.9%（n = 112）始终符合指南（“稳定高”），8.2%（n = 116）在最后一次时停止符合指南（“减少者”），4.9%（n = 69）在最后一次时开始符合指南（“增加者”）。“减少者”在基线时每天有69.3%的时间用于SB，每年增加2%（P < 0.005），轻活动保持在23.3%（变化，每年-0.2%; P = 0.4），总MVPA从7.1%每年减少-1.7%（P < 0.001）。>30分钟的久坐次数从每年5.1次增加到0.1次（P = 0.02）。在老年人中，由于MVPA的减少，总PA急剧下降，而轻度PA相对较少，久坐时间和长时间久坐发作增加。
Supplemental digital content is available in the text. The steep decline in physical activity (PA) among the oldest old is not well understood; there is little information about the patterns of change in PA and sedentary behaviour (SB) in older people. Longitudinal data on objectively measured PA data can give insights about how PA and SB change with age. Men age 70–90 yr, from a United Kingdom population-based cohort wore a GT3X accelerometer over the hip annually on up to three occasions (56%, 50%, and 51% response rates) spanning 2 yr. Multilevel models were used to estimate change in activity. Men were grouped according to achieving ≥150 min·wk−1 of MVPA in bouts of ≥10 min (current guidelines) at two or three time points. A total of 1419 ambulatory men had ≥600 min wear time on ≥3 d at ≥2 time points. At baseline, men took 4806 steps per day and spent 72.5% of their day in SB, 23.1% in light PA, and 4.1% in moderate-to-vigorous PA (MVPA). Mean change per year was −341 steps, +1.1% SB, −0.7% light PA, and −0.4% MVPA each day (all P < 0.001). A total of 76.3% (n = 1083) never met guidelines (“stable low”), 7.9% (n = 112) consistently met guidelines (“stable high”), 8.2% (n = 116) stopped meeting guidelines by the last occasion (“decreasers”), and 4.9% (n = 69) started meeting guidelines by the last occasion (“increasers”). “Decreasers” spent 69.3% of each day in SB at baseline, which increased by 2% per year (P < 0.005), light activity remained at 23.3% (change, −0.2% per year; P = 0.4), and total MVPA decreased from 7.1% by −1.7% per year, (P < 0.001). The number of sedentary bouts >30 min increased from 5.1 by 0.1 per year (P = 0.02). Among older adults, the steep decline in total PA occurred because of reductions in MVPA, while light PA is relatively spared and sedentary time and long sedentary bouts increase.