老年人时间利用与心肺功能、肥胖和心血管代谢风险之间的关系：组成性等时替代分析。

Relationships between older adults' use of time and cardio-respiratory fitness, obesity and cardio-metabolic risk: A compositional isotemporal substitution analysis.

机构信息

Alliance for Research in Exercise, Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia, Adelaide, Australia.

College of Nursing and Health Sciences, Flinders University, Adelaide, Australia.

出版信息

Maturitas. 2018 Apr;110:104-110. doi: 10.1016/j.maturitas.2018.02.003. Epub 2018 Feb 7.

DOI:10.1016/j.maturitas.2018.02.003

PMID:29563028

Abstract

OBJECTIVE

Older adults' health has been linked with time in moderate-to-vigorous physical activity (MVPA), and recent studies suggest time in sedentary behaviour may also be important. Time-use behaviours (MVPA, light physical activity, sedentary time and sleep) are co-dependent, and therefore their associations with health should be examined in an integrated manner. This is the first study to investigate the relationship between older adults' reallocation of time among these time-use behaviours and markers of cardio-respiratory fitness, obesity and cardio-metabolic risk.

STUDY DESIGN

Cross-sectional study of 122 Australians (65 ± 3 y, 61% female).

MAIN OUTCOME MEASURES

Daily time use: average daily minutes spent in MVPA, light physical activity, sedentary time and sleep derived from 24-h, 7-day accelerometry, were conceptualised as a time-use composition. Cardio-respiratory fitness: graded submaximal cycle ergometer test. Obesity: objectively measured body mass index (BMI) and waist-to-hip ratio (WHR). Cardio-metabolic risk: sphygmomanometer-measured resting blood pressure and fingertip blood sampling for fasting total cholesterol and glucose.

RESULTS

Time-use composition was significantly associated with obesity markers (BMI, p = 0.001; WHR, p < 0.001). The reallocation of 15 min to MVPA from any of the other behaviours was associated with approximately +1.1 (95% confidence interval 0.2; 1.9) ml/kg min VO, -0.7 (-1.0; -0.3) BMI units and -1.2 (-1.8; -0.7) WHR percentage points, while the opposite reallocation (15 min from MVPA to other behaviours) was associated with larger difference estimates of -1.8 (-3.2; -0.4) ml/kg min VO, +1.2 (0.5; 1.9) BMI units and +2.1 (1.2; 3.1) WHR percentage points.

CONCLUSION

These findings reinforce the importance of MVPA for health among older adults. Interventions to maintain MVPA, even without increasing it, may be valuable.

摘要

目的

中高强度体力活动（MVPA）与老年人的健康有关，最近的研究表明，久坐行为的时间也可能很重要。时间利用行为（MVPA、低强度体力活动、久坐时间和睡眠）相互依赖，因此它们与健康的关系应该以综合的方式进行检查。这是第一项研究，旨在调查老年人在这些时间利用行为之间重新分配时间与心肺功能适应性、肥胖和心血管代谢风险标志物之间的关系。

研究设计

对 122 名澳大利亚人（65±3 岁，61%为女性）进行横断面研究。

主要观察指标

日常时间利用：通过 24 小时 7 天加速度计得出的 MVPA、低强度体力活动、久坐时间和睡眠的平均每日分钟数，被概念化为时间利用组成。心肺功能适应性：分级次最大循环测力计测试。肥胖：客观测量体重指数（BMI）和腰臀比（WHR）。心血管代谢风险：血压计测量静息血压和指尖采血检测空腹总胆固醇和血糖。

结果

时间利用组成与肥胖标志物显著相关（BMI，p=0.001；WHR，p<0.001）。从任何其他行为中重新分配 15 分钟到 MVPA 与大约+1.1（95%置信区间 0.2；1.9）ml/kg·min VO2、-0.7（-1.0；-0.3）BMI 单位和-1.2（-1.8；-0.7）WHR 百分比点相关，而相反的重新分配（15 分钟从 MVPA 到其他行为）与更大的差异估计值相关，即-1.8（-3.2；-0.4）ml/kg·min VO2、+1.2（0.5；1.9）BMI 单位和+2.1（1.2；3.1）WHR 百分比点。