@article{ref1,
title="Accelerometer-monitored sedentary behavior and observed physical function loss",
journal="American journal of public health",
year="2015",
author="Semanik, Pamela A. and Lee, Jungwha and Song, Jing and Chang, Rowland W. and Sohn, Min-Woong and Ehrlich-Jones, Linda S. and Ainsworth, Barbara E. and Nevitt, Michael M. and Kwoh, C. Kent and Dunlop, Dorothy D.",
volume="105",
number="3",
pages="560-566",
abstract="OBJECTIVEs. We examined whether objectively measured sedentary behavior is related to subsequent functional loss among community-dwelling adults with or at high risk for knee osteoarthritis. <br><br>METHODS. We analyzed longitudinal data (2008-2012) from 1659 Osteoarthritis Initiative participants aged 49 to 83 years in 4 cities. Baseline sedentary time was assessed by accelerometer monitoring. Functional loss (gait speed and chair stand testing) was regressed on baseline sedentary time and covariates (baseline function; socioeconomics [age, gender, race/ethnicity, income, education], health factors [obesity, depression, comorbidities, knee symptoms, knee osteoarthritis severity, prior knee injury, other lower extremity pain, smoking], and moderate-to-vigorous activity). <br><br>RESULTS. This cohort spent almost two thirds of their waking hours (average = 9.8 h) in sedentary behaviors. Sedentary time was significantly positively associated with subsequent functional loss in both gait speed (-1.66 ft/min decrease per 10% increment sedentary percentage waking hours) and chair stand rate (-0.75 repetitions/min decrease), controlling for covariates. <br><br>CONCLUSIONS. Being less sedentary was related to less future decline in function, independent of time spent in moderate-to-vigorous activity. Both limiting sedentary activities and promoting physical activity in adults with knee osteoarthritis may be important in maintaining function. (Am J Public Health. Published online ahead of print January 20, 2015: e1-e7. doi:10.2105/AJPH.2014.302270).<p /> <p>Language: en</p>",
language="en",
issn="0090-0036",
doi="10.2105/AJPH.2014.302270",
url="http://dx.doi.org/10.2105/AJPH.2014.302270"
}