Tags

Type your tag names separated by a space and hit enter

Morningness and eveningness: the free cortisol rise after awakening in "early birds" and "night owls".
Biol Psychol. 2006 May; 72(2):141-6.BP

Abstract

We investigated salivary cortisol profiles in the first hour after awakening in morning versus evening chronotypes. Chronotypes were defined by Horne and Ostberg's Owl-and-Lark-Questionnaire. In a sample of 112 healthy, day-active young men, we identified 9 morning and 29 evening chronotypes. Saliva samples were collected 0, 30, 45, and 60min after awakening on 2 consecutive days. Log-transformed cortisol levels were analyzed with General Linear Model procedures (GLMs) and awakening time and sleep duration were entered as covariates. On both days, a significant main effect of chronotype emerged (both p=0.02), and this effect could not be explained by differences in awakening time or sleep duration. The present data support the idea that morning relative to evening chronotypes might show higher cortisol levels in the first hour after awakening. In sum, individual chronotype should be acknowledged as one further possible source of interindividual variability in the cortisol rise after awakening.

Authors+Show Affiliations

Department of Clinical and Theoretical Psychobiology, University of Trier, Johanniterufer 15, D-54290 Trier, Germany. kudielka@uni-trier.deNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

16236420

Citation

Kudielka, Brigitte M., et al. "Morningness and Eveningness: the Free Cortisol Rise After Awakening in "early Birds" and "night Owls"." Biological Psychology, vol. 72, no. 2, 2006, pp. 141-6.
Kudielka BM, Federenko IS, Hellhammer DH, et al. Morningness and eveningness: the free cortisol rise after awakening in "early birds" and "night owls". Biol Psychol. 2006;72(2):141-6.
Kudielka, B. M., Federenko, I. S., Hellhammer, D. H., & Wüst, S. (2006). Morningness and eveningness: the free cortisol rise after awakening in "early birds" and "night owls". Biological Psychology, 72(2), 141-6.
Kudielka BM, et al. Morningness and Eveningness: the Free Cortisol Rise After Awakening in "early Birds" and "night Owls". Biol Psychol. 2006;72(2):141-6. PubMed PMID: 16236420.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Morningness and eveningness: the free cortisol rise after awakening in "early birds" and "night owls". AU - Kudielka,Brigitte M, AU - Federenko,Ilona S, AU - Hellhammer,Dirk H, AU - Wüst,Stefan, Y1 - 2005/10/19/ PY - 2005/05/02/received PY - 2005/08/09/revised PY - 2005/08/11/accepted PY - 2005/10/21/pubmed PY - 2006/9/9/medline PY - 2005/10/21/entrez SP - 141 EP - 6 JF - Biological psychology JO - Biol Psychol VL - 72 IS - 2 N2 - We investigated salivary cortisol profiles in the first hour after awakening in morning versus evening chronotypes. Chronotypes were defined by Horne and Ostberg's Owl-and-Lark-Questionnaire. In a sample of 112 healthy, day-active young men, we identified 9 morning and 29 evening chronotypes. Saliva samples were collected 0, 30, 45, and 60min after awakening on 2 consecutive days. Log-transformed cortisol levels were analyzed with General Linear Model procedures (GLMs) and awakening time and sleep duration were entered as covariates. On both days, a significant main effect of chronotype emerged (both p=0.02), and this effect could not be explained by differences in awakening time or sleep duration. The present data support the idea that morning relative to evening chronotypes might show higher cortisol levels in the first hour after awakening. In sum, individual chronotype should be acknowledged as one further possible source of interindividual variability in the cortisol rise after awakening. SN - 0301-0511 UR - https://www.unboundmedicine.com/medline/citation/16236420/Morningness_and_eveningness:_the_free_cortisol_rise_after_awakening_in_"early_birds"_and_"night_owls"_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0301-0511(05)00140-7 DB - PRIME DP - Unbound Medicine ER -