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dc.contributor.authorPadilha, Heloisa Guarita [UNIFESP]
dc.contributor.authorCrispim, Cibele Aparecida [UNIFESP]
dc.contributor.authorZimberg, Iona Zalcman [UNIFESP]
dc.contributor.authorFolkard, Simon
dc.contributor.authorTufik, Sergio [UNIFESP]
dc.contributor.authorMello, Marco Tulio de [UNIFESP]
dc.identifier.citationChronobiology International. London: Informa Healthcare, v. 27, n. 5, p. 1080-1092, 2010.
dc.description.abstractShiftwork has been associated with a higher propensity for the development of metabolic disorders and obesity. the aim of the study was to investigate concentrations of glucose, cortisol, and insulin among fixed night workers (n = 9), fixed early morning workers (n = 6), and day workers (n = 7). Food intake was recorded for 7 days using a diary. Blood samples were collected every 4 h over the course of 24 h, yielding six samples. Total carbohydrate intake was lowest (p < .0005), whereas fat (p = .03) and protein (p < .0005) were highest on the early morning shifts. Early morning workers also had overall elevated cortisol levels relative to the other two groups. Cortisol levels appeared to be more influenced by time since waking prior to the shift than by time-of-day. Cortisol was highest for the early morning group than the day group 12 h after waking, and both the early morning and night groups had higher levels than the day group 16 h after waking (p < .05 in all cases). in contrast, the homesostatsis model assessment of insulin resistance (HOMA-IR) appeared to be more influenced by time-of-day than by time since waking prior to the shift. the early morning group had higher levels of HOMA-IR at 08: 00 h than the other groups (p < .05). in conclusion, the early morning group had the highest overall concentrations of cortisol and tended to have higher levels of HOMA-IR, indicating that more attention should be given to these workers. Moreover, all three groups showed pronounced cortisol levels on awakening, suggesting that they may have adjusted to their awaking time. (Author:
dc.publisherInforma Healthcare
dc.relation.ispartofChronobiology International
dc.rightsAcesso restrito
dc.subjectFood intakeen
dc.subjectGlucose metabolismen
dc.subjectInsulin resistanceen
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.contributor.institutionUniv Paris 05
dc.contributor.institutionSwansea Univ
dc.contributor.institutionConselho Nacl Desenvolvimento Cient & Tecnol CNPq
dc.description.affiliationUniversidade Federal de São Paulo, Dept Psicobiol, BR-04020050 São Paulo, Brazil
dc.description.affiliationUniv Paris 05, Lab Anthropol Appl Ergon Comportement & Interact, EA 4070, Paris, France
dc.description.affiliationSwansea Univ, Body Rhythms & Shiftwork Ctr, Dept Psychol, Swansea, W Glam, Wales
dc.description.affiliationCEPE, São Paulo, Brazil
dc.description.affiliationConselho Nacl Desenvolvimento Cient & Tecnol CNPq, São Paulo, Brazil
dc.description.affiliationUnifespUniversidade Federal de São Paulo, Dept Psicobiol, BR-04020050 São Paulo, Brazil
dc.description.sourceWeb of Science
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