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Artykuły w czasopismach na temat „Chronotype”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 25 lipca 2025

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Di Somma, Carolina, Elisabetta Scarano, Luigi Barrea, et al. "Craniopharyngioma, Chronotypes and Metabolic Risk Profile." Nutrients 13, no. 10 (2021): 3444. http://dx.doi.org/10.3390/nu13103444.

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Aim: To investigate the potential association among Craniopharyngioma (CP), chronotypes and metabolic risk profile. Subjects and Methods: The study population included 28 patients (46.4% males; 42.6 ± 15.8 years) and 28 controls, age, gender and BMI matched (46.4% males; 46.5 ± 12.9 years). In this study sample, we evaluated: anthropometric measurements (waist circumference, WC; BMI), plasma glucose, lipid profile, and systolic (SBP) and diastolic (DBP) blood pressure. Morningness-Eveningness was measured with the Horne-Ostberg Morningness-Eveningness Questionnaire (MEQ), which included 19 que

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Wangsa, Cindy Leona, Nawanto Agung Prastowo, Veronica Dwi Jani Juliawati, and Francisca Tjhay. "THE DIFFERENCE IN GRADE POINTS BETWEEN MORNING AND EVENING CHRONOTYPES AMONG PRECLINICAL MEDICAL STUDENTS." Jurnal Pendidikan Kedokteran Indonesia: The Indonesian Journal of Medical Education 11, no. 2 (2022): 148. http://dx.doi.org/10.22146/jpki.65919.

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Background: Every person has a different diurnal preference, sleep-wake cycle, and alertness known as chronotype. There are three chronotypes, that is morning, evening, and intermediate type. Medical students with evening chronotype are still forced to follow the standard academic schedule in the morning, hence their sleep time is reduced. This problem results in lower grade points since sleep quality affects academic achievement. This study aimed to analyze the difference in grade points between morning and evening chronotypes among medical students.Methods: A comparative cross-sectional stud

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Katsarova, Stanislava S., Emma Redman, Franciskos Arsenyadis, et al. "Differences in Dietary Intake, Eating Occasion Timings and Eating Windows between Chronotypes in Adults Living with Type 2 Diabetes Mellitus." Nutrients 15, no. 18 (2023): 3868. http://dx.doi.org/10.3390/nu15183868.

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Chronotype studies investigating dietary intake, eating occasions (EO) and eating windows (EW) are sparse in people with type 2 Diabetes mellitus (T2DM). This analysis reports data from the CODEC study. The Morningness-Eveningness questionnaire (MEQ) assessed chronotype preference. Diet diaries assessed dietary intake and temporal distribution. Regression analysis assessed whether dietary intake, EW, or EO differed by chronotype. 411 participants were included in this analysis. There were no differences in energy, macronutrient intake or EW between chronotypes. Compared to evening chronotypes,

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Crane, Tracy E., Austin Miller, Meghan B. Skiba, Sidney Donzella, and Cynthia A. Thomson. "Association of chronotype and pain at baseline in ovarian cancer survivors participating in a lifestyle intervention (NRG/GOG 0225)." Journal of Clinical Oncology 38, no. 15_suppl (2020): 6018. http://dx.doi.org/10.1200/jco.2020.38.15_suppl.6018.

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6018 Background: Chronotype is defined as an individual’s propensity to sleep at a specific time in a 24-hour cycle with late chronotype associated with poorer health outcomes including cancer. Chronotype remains relatively undefined in ovarian cancer. The Lifestyle Intervention for oVarian cancer Enhanced Survival (LIVES) study is testing whether 1205 women randomized to a diet and physical activity intervention for 24-months will have longer progression-free survival versus an attention control. Here we determine the association of late and early vs mid chronotypes and patient reported outco

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Kervezee, Laura, Fernando Gonzales-Aste, Philippe Boudreau, and Diane Boivin. "288 Chronotype-dependent impact of napping on sleep behavior in rotating shift workers." Sleep 44, Supplement_2 (2021): A115—A116. http://dx.doi.org/10.1093/sleep/zsab072.287.

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Abstract Introduction Rotating shift work is known to adversely impact sleep. Napping is one of the strategies that workers can use to mitigate the effect of shift work on their sleep. In this study, we investigated the effect of chronotype on napping behavior in police officers involved in rotating shift work. Methods Actigraphy-based sleep measures and chronotype information was available from 74 police officers (20 women and 54 men; age [mean ± SD]: 32 ± 5.4 years) that participated in a 35-day field study during which they worked morning, evening, and night shifts. A generalized linear mix

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Reis, Daniel, and Nazanin Bahraini. "0354 Early to Bed and Early to Rise? A Comparison of Actigraphy-derived Sleep and Circadian Timing Across Chronotypes." SLEEP 47, Supplement_1 (2024): A152. http://dx.doi.org/10.1093/sleep/zsae067.0354.

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Abstract Introduction Evening chronotype is associated with increased risk for depression and suicide-related outcomes. This may be due to circadian-sleep misalignment, as previous studies have found chronotype-related differences in the relative timing between circadian phase (i.e., dim light melatonin; DLMO) and sleep. However, such differences may be attributable to variation in intrinsic circadian period length across chronotypes, rather than reflect actual circadian misalignment among those with an evening chronotype. The present study sought to compare predicted circadian and sleep timin

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Pogonysheva, Irina A., Inna I. Lunyak, and Denis A. Pogonyshev. "Annual dynamics of dispersion mapping indicators of electrocardiogram tracing in students with different chronotypes." Bulletin of Nizhnevartovsk State University, no. 2 (54) (June 20, 2021): 88–92. http://dx.doi.org/10.36906/2311-4444/21-2/11.

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The paper examines the annual profile of fluctuating microalternations of some ECG parameters in healthy students who live in northern conditions and have different chronotypes. The main method of the research was the dispersion mapping that helped assess the energy and metabolic processes in myocardium. Among male and female students, 14,3% had the morning chronotype, 50,7% had the arrhythmic chronotype, and 35% had the evening chronotype. Previously published research results showed a similar distribution of chronotypes among the population of the north: individuals with the arrhythmic chron

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Nikolaev, E. L., I. Poverinov та M. Alhasan. "Сhronotype and health related quality of life among undergraduate university students". European Psychiatry 67, S1 (2024): S671—S672. http://dx.doi.org/10.1192/j.eurpsy.2024.1395.

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IntroductionChronotype represents genetically determined behavioral characteristics of a person’s twenty-four-hour activity. Research shows that a person’s chronotype is interrelated with their mental health. Are there similar connections with general health and health related quality of life?ObjectivesTo establish how various chronotypes are represented in university students and if there are any interrelations between chronotypes and health‐related quality of lifeMethodsWe used SF-12 Health Survey и Morningness–Eveningness Questionnaire (MEQ) by Horne and Ostberg to survey 305 university stu

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Pogonysheva, I.A., I. I. Lunyak, and D.A. Pogonyshev. "ANNUAL DYNAMICS OF DISPERSION MAPPING INDICATORS OF ELECTROCARDIOGRAM TRACING IN STUDENTS WITH DIFFERENT CHRONOTYPES." Bulletin of Nizhnevartovsk State University, no. 2 (June 20, 2021): 88–92. https://doi.org/10.36906/2311-4444/21-2/11.

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The paper examines the annual profile of fluctuating microalternations of some ECG parameters in healthy students who live in northern conditions and have different chronotypes. The main method of the research was the dispersion mapping that helped assess the energy and metabolic processes in myocardium. Among male and female students, 14,3% had the morning chronotype, 50,7% had the arrhythmic chronotype, and 35% had the evening chronotype. Previously published research results showed a similar distribution of chronotypes among the population of the north: individuals with the arrhythmic chron

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Palesh, Oxana, M. Melissa Packer, Holly George, Cheryl Koopman, and Pasquale F. Innominato. "Associations between morning–evening chronotype, fatigue, and QOL in breast cancer survivors." Journal of Clinical Oncology 34, no. 3_suppl (2016): 246. http://dx.doi.org/10.1200/jco.2016.34.3_suppl.246.

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246 Background: Emerging evidence suggests that circadian disruption is associated with cancer and cancer treatments. Chronotype is defined as a behaviorally manifested preference for a certain timing of sleep and activity. Previous studies have revealed that living out of sync from one’s innate chronotype can have detrimental effects on one’s health. Although there has been research examining the associations between chronotype and health, not much is known about the relationship between chronotype, fatigue, and QOL in cancer survivors. Methods: 68 Breast cancer survivors completed questionna

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Barrea, Luigi, Giovanna Muscogiuri, Gabriella Pugliese, et al. "Association of the Chronotype Score with Circulating Trimethylamine N-Oxide (TMAO) Concentrations." Nutrients 13, no. 5 (2021): 1671. http://dx.doi.org/10.3390/nu13051671.

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Individual differences in the chronotype, an attitude that best expresses the individual circadian preference in behavioral and biological rhythms, have been associated with cardiometabolic risk and gut dysbiosis. Up to now, there are no studies evaluating the association between chronotypes and circulating TMAO concentrations, a predictor of cardiometabolic risk and a useful marker of gut dysbiosis. In this study population (147 females and 100 males), subjects with the morning chronotype had the lowest BMI and waist circumference (p < 0.001), and a better metabolic profile compared to the

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Crane, T. E., M. B. Skiba, S. Donzella, C. A. Thomson, and S. Parthasarathy. "0414 Chronotype and Sleep Among Ovarian Cancer Survivors Participating in a Lifestyle Intervention." Sleep 43, Supplement_1 (2020): A158—A159. http://dx.doi.org/10.1093/sleep/zsaa056.411.

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Abstract Introduction Chronotype is defined as an individual’s propensity to sleep at a specific time in a 24-hour cycle with late chronotype associated with poorer health outcomes including cancer. The role of chronotype on lifestyle behaviors remains relatively undefined in ovarian cancer. The Lifestyle Intervention for oVarian cancer Enhanced Survival study is testing whether 1205 women randomized to a diet and physical activity intervention for 24-months will have longer progression-free survival versus attention control. Here we determine the frequency and predictors of late versus early

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Plekhanova, Tatiana, Emily Crawley, Melanie J. Davies, et al. "Association between Chronotype and Physical Behaviours in Adolescent Girls." Children 10, no. 5 (2023): 819. http://dx.doi.org/10.3390/children10050819.

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The aim of this study was to (1) describe accelerometer-assessed physical behaviours by chronotype, and (2) examine the association between chronotype and accelerometer-assessed physical behaviours in a cohort of adolescent girls. Chronotype (single question) and physical behaviours (GENEActiv accelerometer on the non-dominant wrist) were assessed in 965 adolescent girls (13.9 ± 0.8 years). Linear mixed-effects models examined the relationships among chronotype and physical behaviours (time in bed, total sleep time, sleep efficiency, sedentary time, overall, light and moderate-to-vigorous phys

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Sansom, K., J. Walsh, P. Eastwood, et al. "P124 Chronotype and OSA combine to modify risk of hypertension." SLEEP Advances 2, Supplement_1 (2021): A61—A62. http://dx.doi.org/10.1093/sleepadvances/zpab014.165.

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Abstract Introduction There are limited data on the association of chronotype and hypertension and on their interaction on hypertension. This study aimed to investigate the independent and combined effects of chronotype and OSA on risk for prevalent hypertension in a middle-aged community population. Methods Baseline data on adult participants (n=1098, female=58%; age mean [range]=56.7[40.8–80.6] years) from an Australian community cohort study were analysed. Shift workers and individuals with incomplete data were excluded. Prevalent hypertension was defined as ‘doctor diagnosed’ and/or an ele

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Sempere-Rubio, Nuria, Mariam Aguas, and Raquel Faubel. "Association between Chronotype, Physical Activity and Sedentary Behaviour: A Systematic Review." International Journal of Environmental Research and Public Health 19, no. 15 (2022): 9646. http://dx.doi.org/10.3390/ijerph19159646.

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Background: The aim of this systematic review is to compile and assess the scientific evidence about the relationship between chronotypes and physical activity (PA). Methods: A systematic review was executed using a structured electronic search in PubMED, Cochrane Library, PsycInfo and Trip Database. The searches employed keywords such as chronotype, sleep, acrophase, chronotype preference, morningness, physical activity and sedentary, using MeSH terms. JBI critical tools were used to appraise methodological aspects. Results: This systematic review includes 23 studies and a total of 505,375 pa

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Greenwood, Leah, and Niamh Tattersall. "From night owl to angry bird: Investigating the association between chronotype and aggression." Abuse: An International Impact Journal 4, no. 2 (2023): 35–57. http://dx.doi.org/10.37576/abuse.2023.051.

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Recent attempts to understand the sleep-aggression relationship highlight the importance of the role of cognition. A related but separate concept of sleep, chronotype (i.e., sleep timings) has also been suggested to contribute to levels of aggression. The current study explores the relationship between chronotype, sleep quality, hostility, aggression, and intimate partner violence (IPV). Two hundred and eight participants completed online questionnaires to explore the contribution of hostility and sleep quality as mediators of the chronotype-aggression relationship. Findings indicate that chro

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Geoca, A., M. Dowling, and V. Jain. "0783 Relationship Between Chronotype And Sleep Duration Among Medical Students." Sleep 43, Supplement_1 (2020): A298. http://dx.doi.org/10.1093/sleep/zsaa056.779.

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Abstract Introduction Previous literature has supported the claim that longer sleepers have later chronotypes. It is also thought that later chronotypes may obtain less sleep during workdays. We aimed to study the association between sleep duration and chronotypes in The George Washington University (GWU) medical students. Methods Eighty-six medical students at GWU (62 F [71%], 24 M [29%]; ages 21-33 y [mean 24.4 y]) filled out the Munich Chronotype Questionnaire (MCTQ). Midpoint of the bedtime and wake times during workdays was used to determine chronotype. Subjects were split into two groups

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Krueger, Bettina, Bianca Stutz, Nicole Jankovic, et al. "The association of chronotype and social jet lag with body composition in German students: The role of physical activity behaviour and the impact of the pandemic lockdown." PLOS ONE 18, no. 1 (2023): e0279620. http://dx.doi.org/10.1371/journal.pone.0279620.

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Young adults with a later chronotype are vulnerable for a discrepancy in sleep rhythm between work- and free days, called social jet lag (SJL). This study analysed (i) chronotype/SJL association with visceral fat/skeletal muscle mass, (ii) the attribution to physical activity behaviour, and (iii) chronotype-specific changes in physical activity behaviour in young adults during the Covid-19 pandemic lockdown. Chronotype and SJL were derived from the Munich-Chrono-Type-Questionnaire in 320 German students (age 18–25 years) from September 2019 to January 2020, 156 of these participated in an onli

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Barrea, Luigi, Ludovica Verde, Claudia Vetrani, Silvia Savastano, Annamaria Colao, and Giovanna Muscogiuri. "Chronotype: A Tool to Screen Eating Habits in Polycystic Ovary Syndrome?" Nutrients 14, no. 5 (2022): 955. http://dx.doi.org/10.3390/nu14050955.

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Polycystic ovary syndrome (PCOS) is the most common endocrine disorders in women of reproductive age, whose lifestyle approach is an essential part of the treatment. Recently, chronotype, i.e., a trait that determines individual’s circadian preference in behavioral and biological rhythms, has been reported to play a role in determining nutrition preferences and the risk of developing chronic diseases. Thus, the aim of this study was to investigate if chronotype categories (morning, evening, and neither) could be used as tool to screen eating habits in women with PCOS. In this observational cro

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Nogueira, Nathálya Gardênia de Holanda Marinh, Bárbara de Paula Ferreira, Fernanda Veruska Narciso, et al. "Influence of Chronotype on Motor Behavior in Healthy Individuals: Analyses of Manual Dexterity in Different Times of the Day." Motor Control 25, no. 3 (2021): 423–36. http://dx.doi.org/10.1123/mc.2020-0094.

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This study investigated the influence of chronotype on motor behavior in a manual dexterity task performed at different times of the day. Sixteen healthy adults of each chronotype (morning, evening, and neither), as measured by the Morningness–Eveningness Questionnaire, practiced both conditions of the Grooved Pegboard Test either in the morning or in the afternoon to early evening. The “neither” chronotype (65.12 ± 7.46) was outperformed (ps ≤ .03) by both the morning (56.09 ± 7.21) and evening (58.94 ± 7.53) chronotypes when the task had higher cognitive and motor demand but was not outperfo

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Ávila, Ubaldo Rodríguez-de, Fabíola Rodrigues-de França Campos, and Adriano Chiombacanga-Nafital. "Effects of Anxiety and Chronotype on Sleep Quality: Advantages of Evening Chronotype in the Post-Pandemic Era." Chronobiology in Medicine 6, no. 3 (2024): 129–34. http://dx.doi.org/10.33069/cim.2024.0018.

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Objective: Prior to the pandemic, all scientific evidence suggested that the evening chronotype is a risk factor for mental pathologies, while the morning chronotype is a protective factor. However, by exploring the effects of anxiety and chronotype on sleep quality in a post-pandemic, segmented by age, new evidence is presented that contradicts the traditional ones.Methods: This quantitative, exploratory, cross-sectional study included 2,253 participants, segmented into three age categories: <18 years, 18–23 years, and >23 years. Linear regression coefficients were calculated using weig

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Sperry, Sarah, Elaine Boland, Helen Burgess, et al. "0636 Examination of longitudinal chronotype stability in individuals with bipolar disorder and healthy controls." SLEEP 46, Supplement_1 (2023): A280. http://dx.doi.org/10.1093/sleep/zsad077.0636.

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Abstract Introduction Introduction: Circadian rhythms have long been conceptualized as central to the pathophysiology of bipolar disorder (BD). Numerous cross-sectional analyses have demonstrated associations of eveningness with BD and greater severity of mood symptoms. Longitudinal studies that evaluate stability of chronotype and its association with mood symptoms are lacking. Methods 88 BD2) from the Prechter Longitudinal Study of BD. Participants completed an average of 10 years of longitudinal assessments of depression (PHQ-9) and mania (Altman Self-Reported Mania Scale) every 2 months, a

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Hicks, Hilary, Genna Losinski, Pilar Thangwaritorn, Alex Laffer, and Amber Watts. "USING ACTIGRAPHY TO ASSESS CHRONOTYPE AND PHYSICAL ACTIVITY IN OLDER ADULTS." Innovation in Aging 6, Supplement_1 (2022): 646. http://dx.doi.org/10.1093/geroni/igac059.2390.

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Abstract Chronotype refers to the time of day that people prefer to be active or to sleep and varies predictably across the lifespan. In younger samples, the morning-chronotype is related to greater levels of physical activity (PA) and improved health outcomes. It is unclear whether this pattern holds in older adults, a group that commonly exhibits an “early bird” preference. We investigated differences in PA patterns between chronotypes in 109 older adults (Mage = 70.45 years) using wrist-worn ActiGraphs in a free-living environment. ActiGraphs captured data about PA and sleep using a novel a

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Muscogiuri, Giovanna, Luigi Barrea, Sara Aprano, et al. "Chronotype and Adherence to the Mediterranean Diet in Obesity: Results from the Opera Prevention Project." Nutrients 12, no. 5 (2020): 1354. http://dx.doi.org/10.3390/nu12051354.

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Chronotype is the attitude of a subject in determining individual circadian preference in behavioral and biological rhythm relative to the external light–dark cycle. Obesity and unhealthy eating habits have been associated with evening chronotype. The Mediterranean diet (MD) is a healthy nutritional pattern that has been reported to be associated with better health and quality of sleep. Thus, the aim of the study was to investigate the association of chronotype categories with adherence to the MD in a population of middle-aged Italian adults. This cross-sectional study included 172 middle-aged

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Ibáñez-del Valle, Vanessa, Rut Navarro-Martínez, and Omar Cauli. "The Associations Between Chronotype and Mental Health in Nursing Students." Journal of Clinical Medicine 14, no. 13 (2025): 4440. https://doi.org/10.3390/jcm14134440.

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Background/Objectives: Numerous studies have documented the effect of human chronotypes on psychological well-being. This study aimed to examine the associations of chronotype subtypes and mental health among Spanish university students. Methods: Sociodemographic data were collected electronically using a self-administered questionnaire with Google Forms. In addition, participants completed The Morningness-Eveningness Questionnaire (MEQ) by Horne and Östberg, the Goldberg Anxiety and Depression Scale (GADS), and the Perceived Stress Scale (PSS). Results: Two hundred and eighty-nine students pa

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Cox, Rebecca, Kenneth Wright, John Axelsson, and Leonie Balter. "0956 Diurnal Variation in Anxiety and Activity Is Influenced by Chronotype and Probable Anxiety-related Disorder Status." SLEEP 47, Supplement_1 (2024): A410. http://dx.doi.org/10.1093/sleep/zsae067.0956.

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Abstract Introduction Anxiety symptoms can vary extensively within a given day. One factor that may influence these variations is chronotype. Evening chronotypes prefer to engage in activities (e.g., sleep, physical and social activity) later in the day and are more likely to suffer from anxiety-related disorders. We here wanted to determine how chronotype influences diurnal variation in anxiety symptoms and to what degree such effects are amplified in individuals with a probable anxiety-related disorder. Methods We examined the diurnal variation in anxiety symptoms and daily activities in mor

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Liu, Zhiwei, Yingying Dong, Ying Xu, and Fei Zhou. "Chronotype distribution in the Chinese population." Brain Science Advances 6, no. 2 (2020): 81–91. http://dx.doi.org/10.26599/bsa.2020.9050004.

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Purpose: Individual chronotypes are reported to be closely associated with mood, health status, and even disease progression. However, no reports of chronotype distribution in the Chinese population have been made available to date. Methods: We performed a chronotype survey using the classic Morningness–Eveningness Questionnaire both online and offline. The webpage-based online survey was distributed via a social network application on mobile phones. The offline survey was distributed to local primary and middle schools. A total of 9476 questionnaires were collected, of which 8395 were valid.

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Henson, Joseph, Alex V. Rowlands, Emma Baldry, et al. "Physical behaviors and chronotype in people with type 2 diabetes." BMJ Open Diabetes Research & Care 8, no. 1 (2020): e001375. http://dx.doi.org/10.1136/bmjdrc-2020-001375.

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IntroductionPrevious investigations have suggested that evening chronotypes may be more susceptible to obesity-related metabolic alterations. However, whether device-measured physical behaviors differ by chronotype in those with type 2 diabetes (T2DM) remains unknown.Research design and methodsThis analysis reports data from the ongoing Chronotype of Patients with Type 2 Diabetes and Effect on Glycaemic Control (CODEC) observational study. Eligible participants were recruited from both primary and secondary care settings in the Midlands area, UK. Participants were asked to wear an acceleromete

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Gorokhova, Svetlana G., Oleg Yu Atkov, Vasiliy V. Serikov, Elena V. Muraseeva, and Viktor F. Pfaf. "Bimodal chronotype in night-shift workers." Occupational Health and Industrial Ecology, no. 12 (February 15, 2019): 59–63. http://dx.doi.org/10.31089/1026-9428-2018-12-59-63.

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Introduction. Typology of diurnal (circadian) human rhythms is actively studied in occupational medicine, from the viewpoint of adaptation to various work conditions including those with shift working schedule. In recent years, evidences outline bimodal chronotype characterized by simultaneously present signs of extreme morning and extreme evening types without dominating one of them. Studies did not cover bimodal chronotype in night-shift workers.Objective is to evaluate presence of bimodal chronotype in night-shift workers if compared to day-shift schedule.Materials and methods. Chronotype o

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AKTAŞ, Sakine, and Pınar GUZEL OZDEMİR. "Effects of Chronotype and Social Jet-Lag on Neurocognitive Functioning." Psikiyatride Guncel Yaklasimlar - Current Approaches in Psychiatry 15, no. 3 (2023): 407–17. http://dx.doi.org/10.18863/pgy.1140109.

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The chronotype, which reflects the circadian rhythm preferences of individuals in their daily activities and sleep-wake cycles, can be considered on a dimension of extreme morningism and extreme eveningism. Individuals with extreme morning and extreme evening chronotypes face many physical and psychological dangers due to accumulated sleep debt, short total sleep time and insufficient sleep efficiency. In extreme chronotypes, especially in extreme evening people, the social jet-lag effect due to the mismatch between social and circadian clocks is thought to exacerbate these dangers. More recen

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Cox, Rebecca, Hannah Ritchie, Kate Sprecher, et al. "0259 Chronotype and affective response to sleep restriction, sleep deprivation, and circadian misalignment." Sleep 45, Supplement_1 (2022): A116—A117. http://dx.doi.org/10.1093/sleep/zsac079.257.

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Abstract Introduction Late chronotypes have been shown to have decreased positive affect during the day and during sleep loss. Findings for negative affect are inconsistent. The present analysis examined the effect of chronotype on positive and negative affect during two sleep and circadian challenges. Methods In both studies, chronotype was determined by habitual mid-sleep time. In Study 1, 10 healthy adults (5 early, 5 late chronotypes) completed a 10-day protocol of sleep restriction followed by total sleep deprivation. Participants maintained habitual 8h sleep schedules at home for 1 week,

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Petrov, Megan, Matthew Buman, Dana Epstein, et al. "660 Chronotype Associations with Insomnia, Depressive Symptoms, and Changes in Sleep and Health Behaviors during the COVID-19 Pandemic." Sleep 44, Supplement_2 (2021): A258. http://dx.doi.org/10.1093/sleep/zsab072.658.

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Abstract Introduction Evening chronotype (i.e., night owl preference) is associated with worse insomnia and depressive symptoms, and poorer health behaviors. The aim of this study was to examine the association between chronotype and these symptoms and health behaviors during COVID-19 pandemic quarantine. Methods An online survey, distributed internationally via social media from 5/21/2020–7/1/2020, asked adults to report sociodemographic/economic information, changes in sleep (midpoint, total sleep time, sleep efficiency, time-in-bed), and health behaviors (i.e., physical activity, sedentary

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Беляева and Viktoriya Belyaeva. "The features of adaptation possibilities of the suvorov military school students withdifferent chronotype." Vladikavkaz Medico-Biological Bulletin 21, no. 31 (2015): 8–13. http://dx.doi.org/10.12737/17131.

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The article presents the results of the analysis of the chronotype, parameters of the bioelectrograms, indicators of the chronotop spatial-temporal perception of the Suvorov Military School students of 13–14 years old. The representatives of expressed morning chronotype dominate among them. “Individual minute” in the students practically coincides with the astronomical minute. It was found out that the parameter of bioelectrogram «fractality» is above in the students with indifferent chronotype, but “mood” is lower than that in the students with expressed morning chronotype.

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Hittle, Beverly M., Claire C. Caruso, Holly J. Jones, Amit Bhattacharya, Joshua Lambert, and Gordon L. Gillespie. "Nurse Health: The Influence of Chronotype and Shift Timing." Western Journal of Nursing Research 42, no. 12 (2020): 1031–41. http://dx.doi.org/10.1177/0193945920916802.

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Extreme chronotype and circadian disrupting work hours may increase nurse disease risks. This national, cross-sectional study of nurses ( N = 527) had three hypotheses. When chronotype and shift times are incongruent, nurses will experience increased likelihood of (1) obesity, (2) cardiovascular disease/risk factors, and (3) obesity or cardiovascular disease/risk factors when theoretically linked variables exist. Chronotype mismatched nurses’ ( n = 206) average sleep (6.1 hours, SD = 1.2) fell below 7–9 hours/24-hours sleep recommendations. Proportion of male nurses was significantly higher ch

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Jabeen, Surriya, Aneesa Matloob, and Syed Mohammad Maqsood. "PRESENT TREND IN EVENINGNESS AMONGST MEDICAL STUDENTS IN THE EAST." Professional Medical Journal 22, no. 04 (2015): 495–99. http://dx.doi.org/10.29309/tpmj/2015.22.04.1335.

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Objectives: To analyze individual preference in organizing their behavior within24 hours(Human chronotypes) also referred to as morningness/ eveningness. Setting: DowMedical College, Dow university of Health Sciences Karachi. Period: From September 2012 toDecember 2013. Study Design: Cross-sectional. Methods: Subjects (Medical students) fromfirst semester to final semester were invited to participate in this study, A total of 710 subjectswere included. Their demographic data such as age, gender was obtained. Instrument is anintegrated questionnaire (Horne JA and Ostberg O Morningness- Eveningn

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López-Gil, José Francisco, Jorge Olivares-Arancibia, Rodrigo Yáñez-Sepúlveda, and Mayra Fernanda Martínez-López. "What Is the Relationship between Chronotype and Disordered Eating in Adolescents? The EHDLA Study." Nutrients 16, no. 16 (2024): 2576. http://dx.doi.org/10.3390/nu16162576.

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Background: Evidence assessing the relationship between chronotype and disordered eating in adolescents is scarce. The current study tried to evaluate the association between chronotype and disordered eating in a sample of Spanish adolescents. Methods: This secondary cross-sectional study analyzed data from the Eating Healthy and Daily Life Activities (EHDLA) study. The sample consisted of 703 adolescents (56.3% girls) aged between 12 and 17 years from the Valle de Ricote (Region of Murcia, Spain). Chronotype was assessed using the Morningness/Eveningness Scale in Children (MESC). Disordered e

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Lan, Anat, Lior Harel, and Haim Einat. "Light and Food: Body Image Moderates the Effects of Chronotype on the Risk to Develop an Eating Disorder." Journal of Clinical Medicine 14, no. 12 (2025): 4328. https://doi.org/10.3390/jcm14124328.

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Background: Evening chronotypes are increasingly recognized as being at elevated risk of psychological vulnerabilities, including sleep disturbances, mood disorders, and disordered eating. Body image, a central self-related construct, has been identified as a key factor influencing eating disorder (ED) risk. This study aimed to explore whether body image moderates the relationship between chronotype and the risk of developing an ED. Methods: A total of 165 adults (139 women; mean age = 35.45) completed validated self-report questionnaires assessing chronotype (Morningness–Eveningness Questionn

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Ragozin, Oleg N., Elena Yu Schalamova, Fatima S. Datieva, and Irina A. Pogonysheva. "Photoperiodic chronotype stability in students of Khanty-Mansi Autonomous Area – Yugra and Vladikavkaz." Bulletin of Nizhnevartovsk State University 57, no. 1 (2022): 65–72. http://dx.doi.org/10.36906/2311-4444/22-1/07.

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The aim of the work is to establish the peculiarities of the organization of various aspects of life in the dynamics of the winter/summer seasons among students studying in the conditions of the photoperiod of the northern region (Khanty-Mansi Autonomous Area Yugra) and the temperate climatic zone (Vladikavkaz). In the Khanty-Mansi Autonomous Area, among students of both sexes, the proportion of persons with evening chronotypes was higher than in Vladikavkaz. Among thenorthernyoung men, there were no persons with a definite morning chronotype, and among the Vladikavkaz students there was noone

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Jędrzejczyk, Justyna, Aleksandra Korn, Olga Łopacińska, et al. "Late chronotype and associated health problems." Quality in Sport 15 (July 7, 2024): 52251. http://dx.doi.org/10.12775/qs.2024.15.52251.

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Introduction: Chronotype reflects an individual's preference for activity and rest within a 24-hour period, governed by the internal circadian clock system located in the suprachiasmatic nuclei of the hypothalamus. There are three chronotypes: Morning, Evening, and Intermediate. The evening type is also called “night owls” or late chronotype. Night owls prefer to be active in the evening and sleep and wake up late. The misalignment between the sleep patterns in late chronotype and the social schedules puts the night owls in danger of physical and mental health issues. Purpose of work: The prim

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Nishimura, Kazuki, Yutaro Tamari, Yuka Nose, Hidetaka Yamaguchi, Sho Onodera, and Koji Nagasaki. "Effects of Irregular Mealtimes on Social and Eating Jet Lags among Japanese College Students." Nutrients 15, no. 9 (2023): 2128. http://dx.doi.org/10.3390/nu15092128.

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College students’ social and eating jet lags and chronotypes may be related to irregular eating habits. Therefore, we examined the relationship between social and eating jet lags, chronotypes, variability in first and last mealtimes, and non-eating duration, as well as the effects of snacking between dinner and bedtime on social and eating jet lags, chronotypes, and mealtime variation. A total of 1900 Japanese male college students were recruited in this study. Mean wake-up time, bedtime, sleeping time, first and last mealtimes, snacks between meals, non-eating duration, the midpoint of non-ea

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van Oosterhout, WPJ, EJW van Someren, GG Schoonman, et al. "Chronotypes and circadian timing in migraine." Cephalalgia 38, no. 4 (2017): 617–25. http://dx.doi.org/10.1177/0333102417698953.

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Background It has been suggested that migraine attacks strike according to circadian patterns and that this might be related to individual chronotype. Here we evaluated and correlated individual chronotypes, stability of the circadian rhythm, and circadian attack timing in a large and well-characterised migraine population. Methods In 2875 migraine patients and 200 non-headache controls we assessed differences in: (i) distribution of chronotypes (Münich Chronotype Questionnaire); (ii) the circadian rhythm’s amplitude and stability (Circadian Type Inventory); and (iii) circadian timing of migra

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Al Abdullatif, Rawan A., Shaea Alkahtani, Graham Finlayson, and Maha H. Alhussain. "Chronotypes and their Association with Obesity-Related Lifestyle Behaviors among Young Female Adults." International Journal of Environmental Research and Public Health 20, no. 2 (2023): 1305. http://dx.doi.org/10.3390/ijerph20021305.

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Circadian rhythms have emerged as key influences on lifestyle behaviors. Circadian rhythms vary inter-individually, and people can be stratified by circadian preference, known as their chronotype, from extreme morning types to extreme evening types. Young adults undergo chronotype changes that involve shifts from morning to evening types. We aimed to examine the association between chronotype and obesity-related lifestyle behaviors, including dietary intake, physical activity, and sleep patterns, among young females. A total of 387 college female students aged 18–25 years completed this cross-

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Amicis, Ramona De, Letizia Galasso, Riccardo Cavallaro, et al. "Sex Differences in the Relationship between Chronotype and Eating Behaviour: A Focus on Binge Eating and Food Addiction." Nutrients 15, no. 21 (2023): 4580. http://dx.doi.org/10.3390/nu15214580.

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Background: Men are more likely than women to have subthreshold overeating disorders. Lifestyle plays a role as a determinant, while chronotype is an emerging factor. Chronotype explains the natural preferences of wakefulness and activity throughout the day: evening chronotypes (E-Types), those most productive in the evening, have been linked with unhealthy dietary patterns and a higher propensity to substance addiction than morning types (M-Types). Methods: We carried out a cross-sectional study on 750 overweight or obese adults (70% females, 48 ± 10 years, BMI 31.7 ± 5.8 kg/m2). The Binge-Ea

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Sato, Toshiaki, Yuki Kawakatsu, Miki Takahata, et al. "0093 Chronotypic characteristics of sleep, mental health, and daily life of Japanese university of health sciences students." SLEEP 46, Supplement_1 (2023): A42. http://dx.doi.org/10.1093/sleep/zsad077.0093.

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Abstract Introduction Students’ lifestyles change after entering the university negatively impacting effective sleep regulation, daytime alertness, motivation to learn, and mental health. An evening chronotype has been increasingly associated with negative impacts upon performance and well-being. Greater understanding of chronotype differences in sleep-related, mental health, and daily life characteristics is needed to develop a sleep health promoting intervention. Methods Cross-sectional descriptive design among health sciences students (nursing, occupational therapy and physical therapy) in

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Brady, Emer M., Andrew P. Hall, Emma Baldry, et al. "Rationale and design of a cross-sectional study to investigate and describe the chronotype of patients with type 2 diabetes and the effect on glycaemic control: the CODEC study." BMJ Open 9, no. 11 (2019): e027773. http://dx.doi.org/10.1136/bmjopen-2018-027773.

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IntroductionA person’s chronotype is their entrained preference for sleep time within the 24 hours clock. It is described by the well-known concept of the ‘lark’ (early riser) and ‘owl’ (late sleeper). Evidence suggests that the ‘owl’ is metabolically disadvantaged due to the standard organisation of our society which favours the ‘lark’ and places physiological stresses on this chronotype. The aim of this study is to explore cardiometabolic health between the lark and owl in a population with an established metabolic condition - type 2 diabetes.MethodsThis cross-sectional, multisite study aims

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Han, Chang Hoon, and Jaeho Chung. "Late Chronotype is Associated with Adolescent Asthma: Assessment Using the Korean-Version MCTQ." International Journal of Environmental Research and Public Health 17, no. 9 (2020): 3000. http://dx.doi.org/10.3390/ijerph17093000.

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Objectives: In the study, we explored whether sleep chronotypes are associated with asthma in adolescents. Methods: We analyzed 24,655 physician-diagnosed adolescent asthmatic patients and 253,775 non-asthmatic adolescent patients from the Korea Youth Risk Behavior Web-based Survey (KYRBWS). Socioeconomic factors, health behaviors factors, psychological factors, and sleep parameters were assessed using the Munich Chronotype Questionnaire (MCTQ). Logistic regression after adjusting for multiple confounders was used to explore the association between sleep chronotype and asthma. Results: The ast

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Rittenhouse, Jeffrey L., Ashley R. Robart, and Heather E. Watts. "Variation in chronotype is associated with migratory timing in a songbird." Biology Letters 15, no. 8 (2019): 20190453. http://dx.doi.org/10.1098/rsbl.2019.0453.

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Like many organisms, birds exhibit daily (circadian) and seasonal biological rhythms, and within populations both daily and seasonal timing often vary among individuals. Because photoperiod interacts with the circadian rhythms of many organisms to induce seasonal changes in behaviour and physiology, it is hypothesized that differences in daily timing, called chronotypes, underpin differences among individuals in the timing of seasonal events. For seasonal events stimulated by increasing daylength, this hypothesis predicts a positive relationship between the timing of daily and seasonal activit

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Magnani, Luca, Andrea Aguglia, Jacques Alexander, et al. "Evening Chronotype and Suicide: Exploring Neuroinflammation and Psychopathological Dimensions as Possible Bridging Factors—A Narrative Review." Brain Sciences 14, no. 1 (2023): 30. http://dx.doi.org/10.3390/brainsci14010030.

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A chronotype is generally defined as the variability of the phase angle of entrainment, while the latter reflects the relationship between the timing of a certain rhythm (e.g., the sleep–wake cycle) and the timing of an external temporal cue. Individuals can be placed on a spectrum from “morning types” (M types) to “evening types” (E types). E-chronotype has been proposed as a transdiagnostic risk factor for psychiatric conditions, and it has been associated with psychopathological dimensions. Eveningness seems to be correlated with both suicidal ideation (SI) and suicidal behavior (SB) throug

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Eken, Özgür, Mertkan Öncü, Ahmet Kurtoğlu, Oguzhan Bozkurt, Musa Türkmen, and Monira I. Aldhahi. "The Acute Effects of 25- Versus 60-Minute Naps on Agility and Vertical Jump Performance in Elite Youth Soccer Players: The Role of Individual Chronotype." Life 15, no. 3 (2025): 422. https://doi.org/10.3390/life15030422.

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Introduction: While napping is recognized as an effective strategy for mitigating insufficient sleep and enhancing athletic recovery, limited research exists on its effects on football players’ anaerobic performance, particularly concerning chronotype variations. This study investigated the impact of strategic napping durations on anaerobic performance and agility in football players under the age of 19 (U19), considering individual chronotypes and psychological factors. Methods: Sixteen young football players (age: 17.18 ± 1.04 years) participated in this crossover randomized controlled study

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Morrison, S. W., F. A. Scheer, and I. C. Mason. "0245 Relationship of Chronotype with Sleep Duration, Daytime Sleepiness, and Sustained Attention in High School Students: A Pilot Study." Sleep 43, Supplement_1 (2020): A94. http://dx.doi.org/10.1093/sleep/zsaa056.243.

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Abstract Introduction People with a later chronotype typically sleep later and perform better later in the day. In an early high school schedule, students with later chronotypes earn lower average grades than those with earlier chronotypes. However, other effects of late chronotype on high school students are poorly understood. This study examined the relationship of chronotype with sleep duration, daytime sleepiness and sustained attention in high school students. Methods This study was conducted at Byram Hills High School in Armonk, NY, where classes begin at 7:45am. During three class perio

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