Sedentary Bout Durations Are Associated with XXXX in Older Adults.

@entity1 @entity1144 @entity28 @entity146
OBJECTIVES: In older adults, @entity146 has been positively associated with @entity28 and impaired metabolic health, additional to low moderate-to-vigorous physical activity (MVPA). Further to the total time spent in @entity146 , the manner in which it is accumulated - number of continuous sedentary bouts of different extends - may also be relevant. The association for objectively measured uninterrupted sedentary bouts and respective patterns with @entity1144 in older adults was examined. DESIGN: Cross-sectional. SETTING: Community-based older @entity1 were recruited in each region of Portugal. Data collection was performed between September, 2007 and May, 2009. @entity1 : 351 older adults (230 @entity1 ) mean age of 75-years. MEASUREMENTS: Sedentary time was measured by an accelerometer (counts/minute <100), worn during waking hours for four consecutive days. Continuous sedentary bouts of 5<min<10, 10< min<20, 20< min<30, 30< min<60, >60 length were treated (counts/minute <100). @entity1144 was defined by waist circumference ( @entity1 >102 cm; @entity1 >88 cm). RESULTS: There were positive and escalating linear associations for the continuum of sedentary bouts' lengths with waist circumference. Logistic regression showed that for each additional sedentary bout of 10< min<20 the odds of being abdominally obese increased by 6.8% (OR=1.07, 95% CI: 1.02 - 1.13) up to 48% (OR=1.48, 95% CI: 1.07 - 2.03) for each 1-hour sedentary bout increment, after controlling for age, gender, total sedentary time, MVPA time, total wear time, movement counts within the sedentary bouts, socio-demographic and other behavioral attributes, and medical history. CONCLUSION: These findings indicate positive graded associations for continuous sedentary bouts with @entity1144 . Public health recommendations regarding breaking up sedentary time more often, potentially avoiding very prolonged bouts of sedentary time, are expected to be relevant for older adults.
