Abstract P561: Reallocation of Sedentary Time With Light Physical Activity is Associated With Higher Sleep Efficiency in African Caribbeans

IntroductionSleep efficiency (or sleep continuity, i.e., a ratio of time spent sleeping to time spent in bed), is inversely associated with hypertension, impaired glucose metabolism, CVD risk, and mortality risk. Prolonged sedentary behavior and physical activity are independently associated with sl...

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Published in:Circulation (New York, N.Y.) N.Y.), 2023-02, Vol.147 (Suppl_1), p.AP561-AP561
Main Authors: Acevedo-Fontanez, Adrianna I, Cvejkus, Ryan, Hawkins, Marquis, Kuipers, Allison L, Marron, Megan M, Zmuda, Joseph, Barinas-Mitchell, Emma, Wheeler, Victor, Miljkovic, Iva
Format: Article
Language:English
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Summary:IntroductionSleep efficiency (or sleep continuity, i.e., a ratio of time spent sleeping to time spent in bed), is inversely associated with hypertension, impaired glucose metabolism, CVD risk, and mortality risk. Prolonged sedentary behavior and physical activity are independently associated with sleep efficiency. However, it is not well documented how substituting time in sedentary behavior with physical activity affects sleep efficiency, especially among African-ancestry populations, who are at high risk for CVD. AimTo determine if displacement of sedentary time with activity was cross-sectionally associated with higher sleep efficiency among African Caribbean men (n=231) and women (n=668) from the Tobago Health Study. MethodsSleep efficiency, sedentary behavior (SB), light physical activity (LPA), and moderate to vigorous physical activity (MVPA) were collected using a SenseWear Pro Armband. Participants wore the armband at all times, except in water, for 4-7 days. We used the Isotemporal Substitution Framework paired with linear regression to examine associations of SB, LPA and MVPA with sleep efficiency adjusting for age, education, BMI, hypertension, diabetes, smoking, alcohol consumption, caffeine intake, and sleep medication. ResultsMen (mean age ± Standard deviation63.2 ± 8.2 years; mean BMI 28.2 ± 4.8 kg/m2) spent on average less time in SB (12.4 ± 2.9 hours/day) and more time in LPA (4.7 ± 2.1 hours /day) and MVPA (0.92 ± 0.88 hours/day) than women (mean age 55.6 ± 8.7 years; mean BMI 31.8 ± 6.4 kg/m2) (all p-vales
ISSN:0009-7322
1524-4539
DOI:10.1161/circ.147.suppl_1.P561