14 Furthermore, studies suggest that replacement of sedentary time with light intensity activity benefits cardiovascular health. In a large population sample of adults in Australia, increased sitting time was associated with increased cardiovascular risk including elevated systolic blood pressure and an 18% increase in risk for cardiovascular disease-related mortality with every hour increment in TV watching. 13Ĭhronic exposure to high amounts of sedentary behavior is also associated with poor cardiovascular health. The sedentary behavior intervention led to improved physical function as measured by the Short Physical Performance Battery (SPPB) whereas the MVPA group did not show improvements in function. The sedentary behavior intervention promoted reduction of prolonged sitting through individualized counseling and an activity armband while the MVPA group received individualized counseling sessions to encourage participation in 150 minutes of moderate activity, such as brisk walking, per week. In a study by Barone Gibbs, community-dwelling older adults were randomized to 12-week behavioral interventions that targeted decreased sedentary behavior or increased moderate to vigorous physical activity (MVPA). 12 Additional studies suggest that reduction in sedentary time is beneficial for physical function in older adults. 8– 11 In a cross-sectional study, older adults with less sedentary behavior and more breaks in prolonged sitting had better physical function after adjusting for moderate to vigorous activity. Sedentary behavior is shown to have a negative impact on physical function in older adults. Sedentary behavior is defined as ‘waking activity expending 11 hours/day) in those who reside in planned group residential settings compared to individuals in private homes. 1 Compounding this issue are growing concerns about prolonged sitting, or sedentary behavior. Older adults are the least active group of Americans with national estimates of less than half achieving weekly physical activity recommendations.
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