TY - JOUR
T1 - Accelerometer-monitored sedentary behavior and observed physical function loss
AU - Semanik, Pamela A.
AU - Lee, Jungwha
AU - Song, Jing
AU - Chang, Rowland W.
AU - Sohn, Min Woong
AU - Ehrlich-Jones, Linda S.
AU - Ainsworth, Barbara E.
AU - Nevitt, Michael M.
AU - Kwoh, C. Kent
AU - Dunlop, Dorothy D.
PY - 2015/3/1
Y1 - 2015/3/1
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.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).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.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.
AB - 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.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).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.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.
UR - http://www.scopus.com/inward/record.url?scp=84922711509&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84922711509&partnerID=8YFLogxK
U2 - 10.2105/AJPH.2014.302270
DO - 10.2105/AJPH.2014.302270
M3 - Article
C2 - 25602883
AN - SCOPUS:84922711509
SN - 0090-0036
VL - 105
SP - 560
EP - 566
JO - American journal of public health
JF - American journal of public health
IS - 3
ER -