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

摘要: Abstract Chronotype describes preferences for functioning at different times of the day. At onset puberty, a sharp shift towards eveningness starts, reaching its peak end adolescence, followed by steady morningness as ageing process occurs. Puberty is also time when sex differences appear, with men being more inclined to than women, which diminishes around menopause; described pattern changes in chronotype leads hypothesis that reproductive hormones may be driving factor behind this conversion. In present study, we aimed verify analysing participants’ testosterone, progesterone and dehydroepiandrosterone (DHEA) levels three months, indicated assays 3-cm hair strands from scalp. Participants (n = 239) both sexes completed Munich Questionnaire. The results showed higher testosterone were related less sleep loss, whereas greater loss was associated lower DHEA. no associations between analysed found. support play role shaping eveningness. We further hypothesised possible cause secretion level evening mechanism offset negative consequences loss.