Gerontology Research Center and Department of Health Sciences, University of Jyväskylä, Finland.
J Gerontol A Biol Sci Med Sci. 2016 Nov;71(11):1466-1471. doi: 10.1093/gerona/glw042. Epub 2016 Mar 14.
Our aim was to study the relationship between objectively measured physical activity and subsequent changes in life-space mobility over 2 years among older people. Life-space mobility refers to the area a person moves through in daily life, taking into account frequency, and need of assistance. Life-space mobility and physical activity correlate, but whether different intensities of objectively assessed physical activity predicts decline in life-space mobility is not known.
Prospective cohort study of the "Life-space Mobility in Old Age" (LISPE) project accelerometer substudy. Participants were community-dwelling older people aged 75-90 (n = 164). Life-space mobility was measured with the Life-Space Assessment at baseline face-to-face home interview and telephone follow-up interviews 1 and 2 years after baseline. Physical activity (step count and time spent in moderate activity, low activity, and sedentary behavior) was measured by a tri-axial accelerometer (Hookie "AM20 Activity Meter") for 7 days at baseline. Generalized estimating equations (GEE models) were used to compare changes in life-space mobility between participants categorized according to the baseline physical activity measures.
Median age of the participants was 79.5 (IQR 6.7) and 64% were women. Over the 2 years, life-space mobility declined significantly among those with lower step counts and less time spent in moderate activity measured at baseline. Time spent in low activity and sedentary behavior did not predict changes in life-space mobility.
In old age, more time spent walking outdoors and accumulation of moderate-intensity physical activity may help to maintain higher life-space mobility, a correlate of good quality of life.
我们的目的是研究老年人的身体活动与 2 年内生活空间移动能力变化之间的关系。生活空间移动能力是指一个人在日常生活中移动的区域，同时考虑到频率和对帮助的需求。生活空间移动能力与身体活动相关，但不同强度的身体活动是否能预测生活空间移动能力的下降尚不清楚。
前瞻性队列研究“老年生活空间移动能力”（LISPE）项目加速度计子研究。参与者为 75-90 岁的社区居住老年人（n=164）。生活空间移动能力通过生活空间评估在基线面对面家访和电话随访 1 年和 2 年后进行测量。身体活动（步数和中度活动、低强度活动和久坐行为的时间）通过三轴加速度计（Hookie“AM20 活动计”）在基线时测量 7 天。使用广义估计方程（GEE 模型）比较根据基线身体活动测量值分类的参与者之间生活空间移动能力的变化。
参与者的中位年龄为 79.5（IQR 6.7），64%为女性。在 2 年内，与低步数和低中强度活动时间的参与者相比，生活空间移动能力显著下降。低强度活动和久坐行为时间与生活空间移动能力的变化无关。
在老年期，更多地进行户外散步和积累中等强度的体力活动可能有助于保持更高的生活空间移动能力，这是生活质量的一个相关指标。
