Chronotype, social jetlag and sleep loss in relation to sex steroids

Konrad S. Jankowski , Małgorzata Fajkowska , Ewa Domaradzka , Agata Wytykowska


Chronotype describes preferences for functioning at different times of the day. At the onset of puberty, a sharp shift towards eveningness starts, reaching its peak at the end of adolescence, followed by a steady shift towards morningness as the ageing process occurs. Puberty is also the time when sex differences appear, with men being more inclined to eveningness than women, which diminishes around menopause; the described pattern of changes in chronotype leads to the hypothesis that reproductive hormones may be the driving factor behind this conversion. In the present study, we aimed to verify this hypothesis by analysing participants’ testosterone, progesterone and dehydroepiandrosterone (DHEA) levels in the three months, as indicated by assays in 3-cm hair strands from the scalp. Participants (n = 239) of both sexes also completed the Munich Chronotype Questionnaire. The results showed that in men higher testosterone levels were related to eveningness and less sleep loss, whereas greater sleep loss was associated with lower levels of DHEA. In women, no associations between chronotype and levels of the analysed hormones were found. The results support the hypothesis that testosterone levels play a role in shaping eveningness. We further hypothesised that a possible cause of the higher secretion level of testosterone in men with the evening chronotype is a mechanism to offset the negative consequences of sleep loss
Author Konrad S. Jankowski
Konrad S. Jankowski,,
, Małgorzata Fajkowska
Małgorzata Fajkowska,,
, Ewa Domaradzka
Ewa Domaradzka,,
, Agata Wytykowska (Wydział Psychologii)
Agata Wytykowska,,
- Wydział Psychologii
Journal seriesPsychoneuroendocrinology, ISSN 0306-4530, (N/A 140 pkt)
Issue year2019
Publication size in sheets0.5
Keywords in EnglishChronotype, Social jetlag, Sleep, Testosterone, DHEA, Progesterone, Hair hormone
ASJC Classification2803 Biological Psychiatry; 2738 Psychiatry and Mental health; 2807 Endocrine and Autonomic Systems; 1310 Endocrinology; 2712 Endocrinology, Diabetes and Metabolism
Languageen angielski
Chronotype, social jetlag and sleep loss in relation to sex steroids_A.Wytykowska.pdf 1.11 MB
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Oswiadczenie_A.Wytykowska_Chronotype, social jetlag.pdf 235.48 KB
Score (nominal)140
Score sourcejournalList
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2016 = 1.375; WoS Impact Factor: 2017 = 4.731 (2) - 2017=5.522 (5)
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