TY  - JOUR
PY  - 2015//
TI  - Accelerometer-monitored sedentary behavior and observed physical function loss
JO  - American journal of public health
A1  - Semanik, Pamela A.
A1  - Lee, Jungwha
A1  - Song, Jing
A1  - Chang, Rowland W.
A1  - Sohn, Min-Woong
A1  - Ehrlich-Jones, Linda S.
A1  - Ainsworth, Barbara E.
A1  - Nevitt, Michael M.
A1  - Kwoh, C. Kent
A1  - Dunlop, Dorothy D.
SP  - 560
EP  - 566
VL  - 105
IS  - 3
N2  - 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>
LA  - en
SN  - 0090-0036
UR  - http://dx.doi.org/10.2105/AJPH.2014.302270
ID  - ref1
ER  -