Twelve-Year Television Viewing Time Trajectories and Physical Function in Older Adults

Natasha Reid, Genevieve N. Healy, Robin M. Daly, Peter Baker, Elizabeth G. Eakin, David W. Dunstan, Neville Owen, Paul A. Gardiner

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    Abstract

    INTRODUCTION: The purpose of this study was to identify trajectories of older adults’ television viewing (TV) time over 12 years; and, to examine their associations with performance-based measures of physical function. METHODS: Data on TV time (hours/week) and socio-demographic factors were collected at each assessment of the Australian Diabetes, Obesity and Lifestyle (AusDiab) Study (1999/2000; 2004/2005; 2011/2012), with objective measures of physical function (2.44m timed-up-and-go [TUG, seconds] and knee extensor test [KES, kg]) collected at the final (2011/2012) assessment. Regression analyses examined predictors of trajectory membership and associations with TUG and KES in those aged 60+ years in 2011/2012. RESULTS: Six TV time trajectories were identified among the 1938 participants (aged 60-97, 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 to the moderate-increasing trajectory (P < 0.001, R = 0.33). CONCLUSION: 12-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.

    Original languageEnglish
    Pages (from-to)1359-1365
    Number of pages7
    JournalMedicine and Science in Sports and Exercise
    Volume49
    Issue number7
    DOIs
    Publication statusPublished - Jul 2017

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