STUDY OBJECTIVES: To evaluate the relations between sleep characteristics and cardiovascular risk factors and napping behavior, and to assess whether daytime napping leads to subsequent better or worse sleep. METHODS: The sample consisted of 224 (African American, Caucasian, and Asian) middle-aged men and women. Sleep measures included nine nights of actigraphy and sleep diaries, sleep questionnaires, and one night of polysomnography to measure sleep disordered breathing. RESULTS: More frequent napping was associated with shorter nighttime sleep duration averaged across the nine nights of actigraphy (especially among African Americans), more daytime sleepiness, more pain and fatigue by diary, and increased body mass index and waist circumference. Shorter nighttime sleep duration was associated with taking a nap during the next day and taking a nap was associated with less efficient sleep the next night. CONCLUSIONS: Napping in middle-aged men and women is associated with overall less nighttime sleep in African Americans and lower sleep efficiency as measured by actigraphy, and increased BMI and central adiposity. These findings point to the importance of measuring of napping in understanding associations of sleep with cardiovascular risk.
STUDY OBJECTIVES: To evaluate the relations between sleep characteristics and cardiovascular risk factors and napping behavior, and to assess whether daytime napping leads to subsequent better or worse sleep. METHODS: The sample consisted of 224 (African American, Caucasian, and Asian) middle-aged men and women. Sleep measures included nine nights of actigraphy and sleep diaries, sleep questionnaires, and one night of polysomnography to measure sleep disordered breathing. RESULTS: More frequent napping was associated with shorter nighttime sleep duration averaged across the nine nights of actigraphy (especially among African Americans), more daytime sleepiness, more pain and fatigue by diary, and increased body mass index and waist circumference. Shorter nighttime sleep duration was associated with taking a nap during the next day and taking a nap was associated with less efficient sleep the next night. CONCLUSIONS: Napping in middle-aged men and women is associated with overall less nighttime sleep in African Americans and lower sleep efficiency as measured by actigraphy, and increased BMI and central adiposity. These findings point to the importance of measuring of napping in understanding associations of sleep with cardiovascular risk.
Authors: A N Vgontzas; S Pejovic; E Zoumakis; H M Lin; E O Bixler; M Basta; J Fang; A Sarrigiannidis; G P Chrousos Journal: Am J Physiol Endocrinol Metab Date: 2006-08-29 Impact factor: 4.310
Authors: T H Monk; C F Reynolds; D J Kupfer; D J Buysse; P A Coble; A J Hayes; M A Machen; S R Petrie; A M Ritenour Journal: J Sleep Res Date: 1994 Impact factor: 3.981
Authors: Catherine S Cole; Jean C McSweeney; Mario A Cleves; Narain Armbya; Donald L Bliwise; Christina M Pettey Journal: Heart Lung Date: 2012-07-06 Impact factor: 2.210
Authors: Indrani Halder; Karen A Matthews; Daniel J Buysse; Patrick J Strollo; Victoria Causer; Steven E Reis; Martica H Hall Journal: Sleep Date: 2015-08-01 Impact factor: 5.849
Authors: Elizabeth J Mezick; Karen A Matthews; Martica H Hall; J Richard Jennings; Thomas W Kamarck Journal: Psychophysiology Date: 2013-09-09 Impact factor: 4.016
Authors: Christopher E Kline; Leah A Irish; Daniel J Buysse; Howard M Kravitz; Michele L Okun; Jane F Owens; Martica H Hall Journal: J Womens Health (Larchmt) Date: 2014-10-29 Impact factor: 2.681
Authors: Alberto R Ramos; Jia Weng; Douglas M Wallace; Megan R Petrov; William K Wohlgemuth; Daniela Sotres-Alvarez; Jose S Loredo; Kathryn J Reid; Phyllis C Zee; Yasmin Mossavar-Rahmani; Sanjay R Patel Journal: Chest Date: 2017-09-29 Impact factor: 9.410