Twelve-Year Television Viewing Time Trajectories and Physical Function in Older Adults
Twelve-Year Television Viewing Time Trajectories and Physical Function in Older Adults
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DOI：
10.1249/mss.0000000000001243
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发表时间：
2017-07-01
期刊：
影响因子：
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通讯作者：
Gardiner, Paul A.
中科院分区：
文献类型：
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作者：
Reid, Natasha;Healy, Genevieve N.;Gardiner, Paul A.
简介：本研究的目的是确定轨迹的老年人的电视观看（TV）的时间为12年，并检查他们的协会与性能为基础的措施的身体功能。研究方法：电视时间数据在澳大利亚糖尿病、肥胖和生活方式研究的每次评估中，（1999/2000、2004/2005和2011/2012），对身体功能进行客观测量在最终（2011/2012）评估时收集的（2.44 m计时起立和行走[TUG，s]和膝关节伸肌力量[KES，kg]测试）。回归分析检查了2011/2012年60岁以上人群中TUG和KES的轨迹成员资格和相关性的预测因素。结果如下：在1938名参与者（年龄，60-97岁; 54%为女性）中确定了6种电视时间轨迹：持续低（9.7%），低增长（22.3%），中度下降（13.5%），中度增长（30.3%），持续高（18.9%）和高增长（5.2%）。与TUG无显著相关性（P > 0.05）。在完全调整的模型中，KES表现在持续低、低增长和持续高轨迹中显著优于中度增长轨迹（P < 0.001，R-2 = 0.33）。结论：电视时间的10年轨迹与老年人的肌肉力量有关。这些发现表明，久坐不动的行为模式可能是晚年肌肉力量的决定因素。
Introduction: The purposes of this study were to identify trajectories of older adults' television viewing (TV) time for 12 yr and to examine their associations with performance-based measures of physical function. Methods: Data on TV time (h.wk(-1)) and sociodemographic factors were collected at each assessment of the Australian Diabetes, Obesity and Lifestyle Study (1999/2000, 2004/2005, and 2011/2012), with objective measures of physical function (2.44 m timed up and go [TUG, s] and knee extensor strength [KES, kg] tests) collected at the final (2011/2012) assessment. Regression analyses examined predictors of trajectory membership and associations with TUG and KES in those 60+ yr of age in 2011/2012. Results: Six TV time trajectories were identified among the 1938 participants (age, 60-97 yr; 54% female): consistently low (9.7%), low-increasing (22.3%), moderate-decreasing (13.5%), moderate-increasing (30.3%), consistently high (18.9%), and high-increasing (5.2%). There were no statistically significant relationships with TUG (P > 0.05). In the fully adjusted model, KES performance was significantly better in the consistently low, low-increasing, and consistently high trajectories, compared with the moderate-increasing trajectory (P < 0.001, R-2 = 0.33). Conclusion: Twelve-year trajectories of TV time were associated with muscle strength in older adults. These findings suggest that patterns of sedentary behavior can be a determinant of muscle strength in later life.