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- W593529892 abstract "Purpose: Short nocturnal sleep leads to more napping in adolescents, and more napping leads to short nocturnal sleep. Short nocturnal sleep has been associated with elevated cardiovascular (CV) risk factors in adolescents in some studies. However, it is unclear if daytime napping is also associated with increased CV risk factors. We investigated whether napping (measured by actigraphy and daily diary measures) was related to elevated CV risk factors, and explored potential moderators of the napping – CV risk relationship: physical activity, sedentary behaviors, and interpersonal conflict. Methods: Participants were 234 healthy high school students (mean age=15.7, 56% black, 53% female). Nocturnal sleep and daytime napping were assessed with both actigraphy and daily diaries across one week. Physical activity and interpersonal conflict were measured by daily diary and questionnaire; sedentary behaviors were measured with questionnaire only. CV risk factors included: sex-standardized waist circumference (WC), insulin resistance (HOMA-IR), high sensitivity C-reactive protein (hs-CRP), interleukin-6 (IL-6), and 24-hour average systolic blood pressure (24-hour SBP). Linear regressions were used, adjusting for age, sex, race, average nocturnal sleep across the study period, and BMI percentile.Results: More days napped by actigraphy was related to elevated IL-6 [B(SE)=.49(.21), p < .05] but lower 24-hour SBP [B(SE)=-5.29(2.64), p < .05]. Napping was not associated with WC, HOMA-IR, or hs-CRP. The relationship between average minutes napped by actigraphy and 24-hour SBP varied as a function of life events conflict (b = -.76, SE = .31, p = .015). At high levels of conflict, napping was associated with lower levels of 24-hour SBP, while at low or average levels of conflict, there was no effect of napping on 24-hour SBP. Neither physical activity nor sedentary behaviors emerged as moderators.Conclusions: No consistent association of napping with CV risk factors was observed. However, actigraphy-derived napping was associated positively with circulating IL-6, a proinflammatory cytokine that is known to impact central inflammatory processes that relate to sleep regulation. Further examination of the direction of this effect is warranted. Results may differ in other age groups who are not as sleep deprived as is the case among adolescents." @default.
- W593529892 created "2016-06-24" @default.
- W593529892 creator A5085125424 @default.
- W593529892 date "2015-01-09" @default.
- W593529892 modified "2023-09-26" @default.
- W593529892 title "Relationship Between Daytime Napping and Cardiovascular Risk Factors in Healthy Black and White Adolescents" @default.
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