Does chronotype predict mornigness and eveningnenss?
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Chronotype, which refers to an individual's preference for certain hours of the day for sleep and activity, predicts both morningness and eveningness . Research indicates that morning types tend to have favorable sleep quality and duration, including increased total sleep time and REM sleep, while evening types exhibit reduced sleep quality, with decreased total sleep time and efficiency . Additionally, eveningness preference has been associated with a higher risk of dropout from physical exercise programs compared to morningness . Furthermore, individuals with an evening chronotype in bipolar disorder populations show higher clinical severity and worse treatment response, emphasizing the importance of assessing chronotype in clinical settings . Overall, chronotype plays a significant role in predicting both morningness and eveningness preferences, impacting various aspects of health and well-being.
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| Papers (5) | Insight |
|---|---|
| Yes, chronotype predicts morningness and eveningness. Morningness is associated with better health outcomes, self-regulation, and sleep quality, as highlighted in the study during the early pandemic. | |
| Yes, the study found that evening chronotype is associated with affective temperaments, clinical severity, and worse treatment outcomes in bipolar disorders, indicating a predictive relationship between chronotype and morningness/eveningness. | |
| Chronotype predicts eveningness and morningness, with evening types showing a higher risk of dropping out from physical exercise programs compared to morning types. | |
| Yes, the study evaluates causal associations of chronotype with pregnancy outcomes but does not find robust evidence of effects on the outcomes, suggesting no clear prediction of morningness or eveningness. | |
| Yes, chronotype predicts morningness and eveningness. Morning type associated with increased total sleep time and REM sleep, while evening type linked to reduced sleep quality and duration. |
Related Questions
Which genes are responsible for determining the chronotype?4 answersThe determination of chronotype, or an individual's preference for sleep and activity times, is influenced by a complex interplay of genetic factors. Research has identified several genes that play significant roles in this process, highlighting the intricate genetic architecture underlying circadian rhythms and chronotype preferences.
The clock genes, including BHLHB2, CLOCK, CSNK1E, NR1D1, PER1, PER2, PER3, and TIMELESS, have been investigated for their associations with chronotype, with gene-gene interactions, particularly between NR1D1 rs2314339, TIMELESS rs4630333, and PER3 rs228669, showing significant associations. Additionally, the expression of timing genes such as clock and bmal1, per1, cry1 in buccal epithelial cells has been linked to variations in chronotype among individuals with odontogenic purulent inflammatory diseases. Single-nucleotide polymorphisms (SNP) in genes like RORA, CLOCK, PER3, NPSR1, NPAS2, DRD3, SLC6A3, and DBH have also been associated with chronotype parameters and, in some cases, with the risk of road traffic accidents among drivers.
Moreover, the PERIOD2 (PER2) gene, particularly the rs35333999 variant, has been shown to associate with later chronotypes and longer intrinsic circadian periods, providing a biological mechanism for inter-individual differences in chronotype. Genome-wide association studies (GWAS) have confirmed associations with the PER2 gene and identified novel genes associated with variability in circadian rhythmicity, although these findings predominantly focus on individuals of European descent.
These genetic findings underscore the complexity of the genetic underpinnings of chronotype, involving both well-studied clock genes and novel genetic variants that modulate core circadian rhythms or light-sensing pathways. The interactions between these genes and their variants contribute to the diversity of chronotypes observed in the human population, affecting sleep patterns, cognitive and physical performance, and even chronic disease risk.
How is chronotype related to work satisfaction?5 answersChronotype, which reflects individual preferences for sleep timing, is linked to work satisfaction among healthcare providers. Studies show that aligning work schedules with chronotypes can enhance job satisfaction and well-being. Research indicates that individuals with earlier chronotypes tend to report higher life satisfaction and lower tense arousal, emphasizing the importance of chronotype in psychological well-being. Furthermore, a study on medical trainees reveals that satisfaction with work shifts is influenced by burn-out levels, with lower satisfaction reported by trainees experiencing burn-out. Overall, understanding and accommodating individual chronotypes in work schedules can lead to increased job satisfaction and potentially reduce burn-out among professionals.
Does the presence of the evening chronotype contribute to increased levels of anxiety in individuals?5 answersThe presence of the evening chronotype is associated with increased levels of anxiety in individuals. Research indicates that individuals with an evening chronotype tend to have higher anxiety symptoms. Specifically, studies have shown that evening chronotype individuals have a higher risk of generalized anxiety and posttraumatic stress disorder. Moreover, the relationship between evening chronotype and anxiety symptoms has been consistently reported, highlighting the impact of circadian preferences on mental health. Therefore, individuals with an evening chronotype may be more prone to experiencing elevated levels of anxiety compared to those with a morning chronotype, emphasizing the importance of considering circadian preferences in assessing mental health outcomes.
Are chronotypes something related to genes?5 answersChronotypes, which refer to individuals' preference for sleep timing, are indeed related to genes. Genetic factors play a role in determining an individual's chronotype, along with environmental and societal factors. Several clock genes, such as BHLHB2, CLOCK, CSNK1E, NR1D1, PER1, PER2, PER3, and TIMELESS, have been identified as relevant genes for chronotype. Genetic studies have shown that certain genetic variants are associated with evening chronotype, indicating a genetic basis for this preference. Additionally, a missense variant of the PER2 gene has been found to be associated with later chronotype, as well as longer intrinsic circadian period. These findings suggest that genetic factors, including specific clock genes, contribute to the development of chronotypes in individuals.
What is chronotype?4 answersChronotype refers to an individual's preferred pattern of circadian activity, specifically their timing of sleep and wakefulness throughout the 24-hour day. It is a trait that varies among individuals and is linked to factors such as genetics, age, and gender. There are different chronotypes, including morning-types (MT) who prefer early bedtimes and wake-up times, and evening-types (ET) who prefer later sleep and wake-up times. Most individuals fall somewhere in the middle of the chronotype continuum. Chronotype can be measured using self-administered questionnaires that have been validated in multiple languages, as well as objective methods such as actigraphy, which measures gross motor activity. Chronotype has implications for mental and physical health, quality of life, and mortality.
Is there a relationship between chronotype and anxiety and depression?3 answersThere is a relationship between chronotype and anxiety and depression. Evening chronotype (ET) has been consistently associated with higher scores of depressive symptoms and vegetative functions domains, as well as panic-agoraphobic symptoms in patients with bipolar disorder (BD) and healthy controls (HC). In insomnia disorder patients, subjective measures such as circadian preference and dysfunctional beliefs of sleep are strongly associated with depressive symptoms, while objective measures like dim light melatonin onset (DLMO) and polysomnographic (PSG) sleep do not strengthen the associations with depressive symptoms. Evening chronotype is also associated with psychological pain and suicidality, and this relationship is mediated by depression and psychological pain. Among medical students, evening chronotype is a risk factor for anxiety and depression. The flexibility of circadian rhythm, as measured by subjective amplitude, is linked to the intensity of suicidal ideation via anxiety/insomnia and social dysfunction.