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12-year television viewing time trajectories and physical function in older adults
Reid, N. Healy, Genevieve N. Daly, Rob Baker, Peter Eakin, Elizabeth Dunstan, David Owen, Neville Gardiner, Paul A.
Reid, N.
Healy, Genevieve N.
Daly, Rob
Baker, Peter
Eakin, Elizabeth
Dunstan, David
Owen, Neville
Gardiner, Paul A.
Abstract
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 (hIwkj1 ) 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, R2 = 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.
Keywords
Date
2017
Type
Journal article
Journal
Medicine and Science in Sports and Exercise
Book
Volume
49
Issue
7
Page Range
1359-1364
Article Number
ACU Department
School of Allied Health
Faculty of Health Sciences
Mary MacKillop Institute for Health Research
Faculty of Health Sciences
Mary MacKillop Institute for Health Research
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