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  Subjects -> HEALTH AND SAFETY (Total: 1453 journals)
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HEALTH AND SAFETY (661 journals)                  1 2 3 4 | Last

Showing 1 - 200 of 203 Journals sorted alphabetically
16 de Abril     Open Access   (Followers: 1)
Acta Informatica Medica     Open Access  
Acta Scientiarum. Health Sciences     Open Access   (Followers: 2)
Adultspan Journal     Hybrid Journal   (Followers: 1)
Advances in Child Development and Behavior     Full-text available via subscription   (Followers: 11)
Advances in Public Health     Open Access   (Followers: 27)
African Health Sciences     Open Access   (Followers: 3)
African Journal for Physical, Health Education, Recreation and Dance     Full-text available via subscription   (Followers: 7)
African Journal of Health Professions Education     Open Access   (Followers: 6)
Afrimedic Journal     Open Access   (Followers: 2)
Ageing & Society     Hybrid Journal   (Followers: 44)
Air Quality, Atmosphere & Health     Hybrid Journal   (Followers: 4)
AJOB Empirical Bioethics     Hybrid Journal   (Followers: 3)
American Journal of Family Therapy     Hybrid Journal   (Followers: 10)
American Journal of Health Economics     Full-text available via subscription   (Followers: 17)
American Journal of Health Education     Hybrid Journal   (Followers: 32)
American Journal of Health Promotion     Hybrid Journal   (Followers: 32)
American Journal of Health Sciences     Open Access   (Followers: 9)
American Journal of Health Studies     Full-text available via subscription   (Followers: 12)
American Journal of Preventive Medicine     Hybrid Journal   (Followers: 28)
American Journal of Public Health     Full-text available via subscription   (Followers: 256)
American Journal of Public Health Research     Open Access   (Followers: 28)
American Medical Writers Association Journal     Full-text available via subscription   (Followers: 5)
Analytic Methods in Accident Research     Hybrid Journal   (Followers: 5)
Annales des Sciences de la Santé     Open Access  
Annali dell'Istituto Superiore di Sanità     Open Access  
Annals of Global Health     Open Access   (Followers: 10)
Annals of Health Law     Open Access   (Followers: 5)
Annals of Tropical Medicine and Public Health     Open Access   (Followers: 13)
Applied Biosafety     Hybrid Journal  
Applied Research In Health And Social Sciences: Interface And Interaction     Open Access   (Followers: 3)
Apuntes Universitarios     Open Access   (Followers: 1)
Archive of Community Health     Open Access   (Followers: 1)
Archives of Medicine and Health Sciences     Open Access   (Followers: 4)
Archives of Suicide Research     Hybrid Journal   (Followers: 7)
Arquivos de Ciências da Saúde     Open Access  
Asia Pacific Journal of Counselling and Psychotherapy     Hybrid Journal   (Followers: 10)
Asia Pacific Journal of Health Management     Full-text available via subscription   (Followers: 4)
Asia-Pacific Journal of Public Health     Hybrid Journal   (Followers: 9)
Asian Journal of Gambling Issues and Public Health     Open Access   (Followers: 4)
Asian Journal of Medicine and Health     Open Access  
Atención Primaria     Open Access   (Followers: 1)
Australasian Journal of Paramedicine     Open Access   (Followers: 4)
Australian Advanced Aesthetics     Full-text available via subscription   (Followers: 4)
Australian Family Physician     Full-text available via subscription   (Followers: 3)
Australian Indigenous HealthBulletin     Free   (Followers: 7)
Autism & Developmental Language Impairments     Open Access   (Followers: 11)
Behavioral Healthcare     Full-text available via subscription   (Followers: 7)
Bijzijn     Hybrid Journal   (Followers: 1)
Bijzijn XL     Hybrid Journal  
Biomedical Safety & Standards     Full-text available via subscription   (Followers: 8)
Birat Journal of Health Sciences     Open Access  
BLDE University Journal of Health Sciences     Open Access  
BMC Oral Health     Open Access   (Followers: 7)
BMC Pregnancy and Childbirth     Open Access   (Followers: 22)
BMJ Simulation & Technology Enhanced Learning     Hybrid Journal   (Followers: 11)
Boletin Médico de Postgrado     Open Access  
Brazilian Journal of Medicine and Human Health     Open Access  
British Journal of Health Psychology     Hybrid Journal   (Followers: 48)
Buletin Penelitian Kesehatan     Open Access   (Followers: 2)
Buletin Penelitian Sistem Kesehatan     Open Access  
Bulletin of the World Health Organization     Open Access   (Followers: 19)
Cadernos de Educação, Saúde e Fisioterapia     Open Access   (Followers: 1)
Cadernos Saúde Coletiva     Open Access   (Followers: 1)
Cambridge Quarterly of Healthcare Ethics     Hybrid Journal   (Followers: 11)
Canadian Family Physician     Partially Free   (Followers: 13)
Canadian Journal of Community Mental Health     Full-text available via subscription   (Followers: 11)
Canadian Journal of Human Sexuality     Hybrid Journal   (Followers: 2)
Canadian Journal of Public Health     Hybrid Journal   (Followers: 23)
Cannabis and Cannabinoid Research     Hybrid Journal   (Followers: 1)
Carta Comunitaria     Open Access  
Case Reports in Women's Health     Open Access   (Followers: 4)
Case Studies in Fire Safety     Open Access   (Followers: 23)
Central Asian Journal of Global Health     Open Access   (Followers: 2)
CES Medicina     Open Access  
Child Abuse Research in South Africa     Full-text available via subscription   (Followers: 1)
Child's Nervous System     Hybrid Journal  
Childhood Obesity and Nutrition     Open Access   (Followers: 11)
Children     Open Access   (Followers: 2)
CHRISMED Journal of Health and Research     Open Access   (Followers: 2)
Christian Journal for Global Health     Open Access  
Ciência & Saúde Coletiva     Open Access   (Followers: 2)
Ciencia e Innovación en Salud     Open Access  
Ciencia y Cuidado     Open Access   (Followers: 1)
Ciencia y Salud Virtual     Open Access  
Ciencia, Tecnología y Salud     Open Access   (Followers: 2)
Cities & Health     Hybrid Journal  
Clinical and Experimental Health Sciences     Open Access   (Followers: 1)
ClinicoEconomics and Outcomes Research     Open Access   (Followers: 2)
Clocks & Sleep     Open Access   (Followers: 1)
CME     Hybrid Journal   (Followers: 2)
CoDAS     Open Access  
Community Health     Open Access   (Followers: 4)
Conflict and Health     Open Access   (Followers: 7)
Contraception and Reproductive Medicine     Open Access   (Followers: 1)
Cuadernos de la Escuela de Salud Pública     Open Access  
Curare     Open Access  
Current Opinion in Behavioral Sciences     Hybrid Journal   (Followers: 10)
Day Surgery Australia     Full-text available via subscription   (Followers: 2)
Design for Health     Hybrid Journal  
Digital Health     Open Access   (Followers: 5)
Disaster Medicine and Public Health Preparedness     Hybrid Journal   (Followers: 14)
Diversity of Research in Health Journal     Open Access  
Dramatherapy     Hybrid Journal   (Followers: 3)
Drogues, santé et société     Open Access   (Followers: 2)
Duazary     Open Access   (Followers: 1)
Düzce Üniversitesi Sağlık Bilimleri Enstitüsü Dergisi / Journal of Duzce University Health Sciences Institute     Open Access  
Early Childhood Research Quarterly     Hybrid Journal   (Followers: 21)
East African Journal of Public Health     Full-text available via subscription   (Followers: 4)
Eating and Weight Disorders - Studies on Anorexia, Bulimia and Obesity     Hybrid Journal   (Followers: 22)
EcoHealth     Hybrid Journal   (Followers: 4)
Education for Health     Open Access   (Followers: 7)
electronic Journal of Health Informatics     Open Access   (Followers: 6)
ElectronicHealthcare     Full-text available via subscription   (Followers: 3)
Elsevier Ergonomics Book Series     Full-text available via subscription   (Followers: 5)
Emergency Services SA     Full-text available via subscription   (Followers: 2)
Ensaios e Ciência: Ciências Biológicas, Agrárias e da Saúde     Open Access  
Environmental Disease     Open Access   (Followers: 4)
Environmental Sciences Europe     Open Access   (Followers: 2)
Epidemics     Open Access   (Followers: 5)
Epidemiologic Perspectives & Innovations     Open Access   (Followers: 6)
Epidemiology, Biostatistics and Public Health     Open Access   (Followers: 20)
Ethics & Human Research     Hybrid Journal   (Followers: 3)
Ethics, Medicine and Public Health     Full-text available via subscription   (Followers: 6)
Ethiopian Journal of Health Development     Open Access   (Followers: 7)
Ethiopian Journal of Health Sciences     Open Access   (Followers: 8)
Ethnicity & Health     Hybrid Journal   (Followers: 13)
Eurasian Journal of Health Technology Assessment     Open Access  
European Journal of Investigation in Health, Psychology and Education     Open Access   (Followers: 4)
European Medical, Health and Pharmaceutical Journal     Open Access   (Followers: 1)
Evaluation & the Health Professions     Hybrid Journal   (Followers: 10)
Evidence-based Medicine & Public Health     Open Access   (Followers: 9)
Evidência - Ciência e Biotecnologia - Interdisciplinar     Open Access  
Expressa Extensão     Open Access  
Face à face     Open Access   (Followers: 1)
Families, Systems, & Health     Full-text available via subscription   (Followers: 9)
Family & Community Health     Hybrid Journal   (Followers: 13)
Family Medicine and Community Health     Open Access   (Followers: 9)
Family Relations     Partially Free   (Followers: 13)
Fatigue : Biomedicine, Health & Behavior     Hybrid Journal   (Followers: 2)
Finnish Journal of eHealth and eWelfare : Finjehew     Open Access  
Food and Public Health     Open Access   (Followers: 17)
Food Quality and Safety     Open Access   (Followers: 1)
Frontiers in Digital Health     Open Access  
Frontiers in Public Health     Open Access   (Followers: 7)
Gaceta Sanitaria     Open Access   (Followers: 3)
Galen Medical Journal     Open Access   (Followers: 1)
Ganesha Journal     Open Access  
Gazi Sağlık Bilimleri Dergisi     Open Access  
Geospatial Health     Open Access  
Gesundheitsökonomie & Qualitätsmanagement     Hybrid Journal   (Followers: 9)
Giornale Italiano di Health Technology Assessment     Full-text available via subscription  
Global Advances in Health and Medicine     Open Access  
Global Challenges     Open Access  
Global Health : Science and Practice     Open Access   (Followers: 7)
Global Health Promotion     Hybrid Journal   (Followers: 16)
Global Journal of Health Science     Open Access   (Followers: 10)
Global Journal of Public Health     Open Access   (Followers: 13)
Global Medical & Health Communication     Open Access   (Followers: 2)
Global Mental Health     Open Access   (Followers: 9)
Global Reproductive Health     Open Access  
Global Security : Health, Science and Policy     Open Access   (Followers: 1)
Globalization and Health     Open Access   (Followers: 7)
Hacia la Promoción de la Salud     Open Access  
Hastane Öncesi Dergisi     Open Access  
Hastings Center Report     Hybrid Journal   (Followers: 4)
HCU Journal     Open Access  
HEADline     Hybrid Journal  
Health & Place     Hybrid Journal   (Followers: 15)
Health & Justice     Open Access   (Followers: 6)
Health : An Interdisciplinary Journal for the Social Study of Health, Illness and Medicine     Hybrid Journal   (Followers: 11)
Health and Human Rights     Open Access   (Followers: 10)
Health and Social Care Chaplaincy     Hybrid Journal   (Followers: 9)
Health and Social Work     Hybrid Journal   (Followers: 60)
Health Behavior and Policy Review     Full-text available via subscription   (Followers: 3)
Health Care Analysis     Hybrid Journal   (Followers: 16)
Health Equity     Open Access  
Health Inform     Full-text available via subscription  
Health Information Management Journal     Hybrid Journal   (Followers: 23)
Health Issues     Full-text available via subscription   (Followers: 2)
Health Notions     Open Access  
Health Policy     Hybrid Journal   (Followers: 45)
Health Policy and Technology     Hybrid Journal   (Followers: 5)
Health Professional Student Journal     Open Access   (Followers: 4)
Health Promotion International     Hybrid Journal   (Followers: 23)
Health Promotion Journal of Australia : Official Journal of Australian Association of Health Promotion Professionals     Full-text available via subscription   (Followers: 8)
Health Promotion Practice     Hybrid Journal   (Followers: 16)
Health Prospect     Open Access   (Followers: 1)
Health Psychology     Full-text available via subscription   (Followers: 54)
Health Psychology Bulletin     Open Access   (Followers: 1)
Health Psychology Research     Open Access   (Followers: 20)
Health Psychology Review     Hybrid Journal   (Followers: 42)
Health Renaissance     Open Access  
Health Research Policy and Systems     Open Access   (Followers: 15)
Health SA Gesondheid     Open Access   (Followers: 2)
Health Science Reports     Open Access   (Followers: 1)
Health Sciences and Disease     Open Access   (Followers: 2)
Health Security     Hybrid Journal  
Health Services Insights     Open Access   (Followers: 1)
Health Systems     Hybrid Journal   (Followers: 5)

        1 2 3 4 | Last

Similar Journals
Journal Cover
Clocks & Sleep
Number of Followers: 1  

  This is an Open Access Journal Open Access journal
ISSN (Online) 2624-5175
Published by MDPI Homepage  [222 journals]
  • Clocks & Sleep, Vol. 1, Pages 117-125: Risk Factors for Snoring in Two
           Canadian First Nations Communities

    • Authors: James A. Dosman, Chandima P. Karunanayake, Kathleen McMullin, Sylvia Abonyi, Donna Rennie, Joshua Lawson, Shelley Kirychuk, Niels Koehncke, Jeremy Seeseequasis, Laurie Jimmy, Vivian R. Ramsden, Mark Fenton, Gregory P. Marchildon, Malcolm King, Punam Pahwa, for the First Nations Lung Health Project Team for the First Nations Lung Health Project Team
      First page: 117
      Abstract: Snoring may be an important predictor of sleep-disordered breathing. Factors related to snoring among First Nations people are not well understood in a population with high rates of smoking and excess body weight. An interviewer-administered survey was conducted among 874 individual participants from 406 households in 2012 and 2013 in two Canadian First Nations communities. The survey collected information on demographic variables, individual and contextual determinants of respiratory health and snoring (classified as present versus absent) and self-reported height and weight. Multiple logistic regression analyses were conducted to examine relationships between snoring and potential risk factors adjusting for age and sex. Snoring was present in 46.2% men and 47.0% women. Considering body mass index, 259 people (30.3%) were overweight and 311 (36.4%) were considered obese. The combined current/former smoking rate was 90.2%. Being overweight, obesity, sinus trouble, current smoking status and former smoking were significantly associated with snoring. Exposure to home dampness and mold were suggestive of an association with snoring. To the degree that snoring may be a predictor of possible sleep-disordered breathing, these results indicate that environmental conditions such as smoking and home exposures may be important factors in the pathogenesis of these conditions.
      Citation: Clocks & Sleep
      PubDate: 2019-01-18
      DOI: 10.3390/clockssleep1010011
      Issue No: Vol. 1, No. 1 (2019)
  • Clocks & Sleep, Vol. 1, Pages 126-139: Later Chronotype Is Associated with
           Higher Alcohol Consumption and More Adverse Childhood Experiences in Young
           Healthy Women

    • Authors: Evelin Hug, Katja Winzeler, Monique C. Pfaltz, Christian Cajochen, Klaus Bader
      First page: 126
      Abstract: This study aimed at examining potential associations of mid sleep timing (chronotype) and social jetlag with intake of alcohol and caffeine, depressive symptoms, and body mass index (BMI) in a sample of healthy young women. Furthermore, it was explored whether these behavioral sleep–wake parameters are associated with adverse childhood experiences (ACEs). In total, 146 women (21.7 ± 1.7 years) took part in a two-week assessment on daily consumption of alcohol and caffeine. They completed questionnaires on ACEs, chronotype, sleep quality and depressive symptoms. Partial correlations and Chi-Square tests were calculated to assess the relationships between the assessed variables. Results show an association on a trend level for chronotype (r = 0.162, p = 0.053) and a significant association for social jetlag (r = 0.169, p = 0.044) with average alcohol intake. Furthermore, participants with above-median ACEs were more likely to be late chronotypes compared to the below-median group (X2(2) = 6.595, p = 0.037). We could replicate the association among late chronotype, social jetlag and higher alcohol consumption in a sample of healthy, young women. Furthermore, our results suggest a relationship between ACEs and chronotype. Although it can be hypothesized that it is rather ACEs that have an impact on chronotype, further research is needed to explore this relationship more and to shed more light on the direction of the association between chronotype and ACEs as well as on underlying mechanisms and possible mediators.
      Citation: Clocks & Sleep
      PubDate: 2019-02-12
      DOI: 10.3390/clockssleep1010012
      Issue No: Vol. 1, No. 1 (2019)
  • Clocks & Sleep, Vol. 1, Pages 140-150: Sleep Timing in Patients with
           Precocious and Delayed Pubertal Development

    • Authors: Elena Jessen, Celine Vetter, Till Roenneberg, Klaus-Peter Liesenkötter, Helene Werner, Oskar G. Jenni, Erwin Lankes, Oliver Blankenstein, Uta Neumann, Birgit Köhler, Susanna Wiegand, Heiko Krude, Peter Kühnen
      First page: 140
      Abstract: Previous studies have reported a shift in the timing of sleep during adolescence toward a later time. To date, it is unclear whether hormonal changes during puberty might contribute to this change in sleeping behavior. We systematically assessed pubertal development and sleep timing in a cross-sectional case-control study in girls with precocious (n = 42) and boys with delayed pubertal development (n = 19). We used the Munich ChronoType Questionnaire and the Children’s ChronoType Questionnaire to assess sleep timing in patients and age- and sex-matched controls (n = 309) and used the midpoint of sleep on free days, corrected for potential sleep debt accumulated during the school week, as a marker for sleep timing. Compared to the controls, girls with central precocious puberty showed a delay in sleep timing of 54 min, and girls with premature pubarche slept on average 30 min later. Male adolescents with delayed pubertal development showed an average sleep midpoint that was 40 min earlier compared to the control group. The results of this pilot study suggest an association between pubertal onset and shifts in sleep timing, which is a novel finding in human sleep behavior. Prospective studies in larger cohorts will be needed to examine the robustness and generalizability of the findings.
      Citation: Clocks & Sleep
      PubDate: 2019-02-16
      DOI: 10.3390/clockssleep1010013
      Issue No: Vol. 1, No. 1 (2019)
  • Clocks & Sleep, Vol. 1, Pages 151-165: Sleep in Hospitalized Patients

    • Authors: Anne Marie Morse, Evin Bender
      First page: 151
      Abstract: Hospitalized patients frequently have disordered and poor-quality sleep due to a variety of both intrinsic and extrinsic factors. These include frequent nighttime intrusions, insomnia related to pain and unfamiliar environments, dark conditions during the day with loss of natural light, and disruption of the natural sleep cycle due to illness. Sleep wake disturbances can result in a deleterious consequence on physical, emotional, and cognitive status, which may impact patient satisfaction, clinical recovery, and hospital length of stay. Despite this, clinicians frequently fail to document sleep disturbances and are generally unaware of the best practices to improve sleep quality in the hospital. A PubMed search was conducted using the terms: (“sleep and hospitalized patients”) and (“sleep and hospitalization”) to review the published data on the topic of sleep in hospitalized medical patients. The search was limited to English-language articles published between 2000 and 2018. Subsequent PubMed searches were performed to clarify the data described in the initial search, including the terms “hospital sleep protocols,” “hospitalized patients sleep documentation,” and “hospitalized patients sleep quality”. The purpose of this review is to discuss sleep disturbances in hospitalized patients with a focus on causes of sleep disturbance, the effect of poor-quality sleep, high risk populations, considerations for surveillance and prevention, and pharmacologic and non-pharmacologic options for treatment.
      Citation: Clocks & Sleep
      PubDate: 2019-02-25
      DOI: 10.3390/clockssleep1010014
      Issue No: Vol. 1, No. 1 (2019)
  • Clocks & Sleep, Vol. 1, Pages 166-184: Sleep Modelling across
           Physiological Levels

    • Authors: Svetlana Postnova
      First page: 166
      Abstract: Sleep and circadian rhythms are regulated across multiple functional, spatial and temporal levels: from genes to networks of coupled neurons and glial cells, to large scale brain dynamics and behaviour. The dynamics at each of these levels are complex and the interaction between the levels is even more so, so research have mostly focused on interactions within the levels to understand the underlying mechanisms—the so-called reductionist approach. Mathematical models were developed to test theories of sleep regulation and guide new experiments at each of these levels and have become an integral part of the field. The advantage of modelling, however, is that it allows us to simulate and test the dynamics of complex biological systems and thus provides a tool to investigate the connections between the different levels and study the system as a whole. In this paper I review key models of sleep developed at different physiological levels and discuss the potential for an integrated systems biology approach for sleep regulation across these levels. I also highlight the necessity of building mechanistic connections between models of sleep and circadian rhythms across these levels.
      Citation: Clocks & Sleep
      PubDate: 2019-03-04
      DOI: 10.3390/clockssleep1010015
      Issue No: Vol. 1, No. 1 (2019)
  • Clocks & Sleep, Vol. 1, Pages 185-192: The Impact of on-Call Work for
           Partners’ Sleep, Relationship Quality and Daytime Functioning

    • Authors: Simone Karan, Grace Vincent, Sally Ferguson, Sarah Jay
      First page: 185
      Abstract: The on-call schedule is a common work arrangement that allows for the continuance of services during periods of low demand or emergencies. Even though 17%–25% of the world’s population participate in on-call work, the human impacts of on-call are generally poorly described in the literature. Of the studies available on the effects of on-call work on workers, disturbances to sleep duration and sleep quality are the most commonly reported, along with negative sleep-related consequences on sleepiness, fatigue, stress and mood. Research has shown that for couples sharing a bed, disturbances to sleep can impair relationship conflict resolution and reduce relationship quality. In the ‘off-site’ on-call scenario where workers are sleeping at home, their co-sleeping partner may be at risk of sleep disturbances and the subsequent detrimental consequences of this disturbed sleep for themselves and their relationship. To date, few studies have investigated the impact of on-call work for partners’ sleep and the potential sleep-related consequences. Therefore, further studies are needed to specifically address whether on-call work impacts the sleep of partners and whether these sleep disturbances also impact the partner’s daily performance and relationship quality. Our aim was to provide a narrative around the existing, relevant literature that both investigate and inform the potential impact of on-call for workers’ partners’ sleep and related consequences.
      Citation: Clocks & Sleep
      PubDate: 2019-03-05
      DOI: 10.3390/clockssleep1010016
      Issue No: Vol. 1, No. 1 (2019)
  • Clocks & Sleep, Vol. 1, Pages 193-208: Light Modulation of Human
           Clocks, Wake, and Sleep

    • Authors: Abhishek S. Prayag, Mirjam Münch, Daniel Aeschbach, Sarah L. Chellappa, Claude Gronfier
      First page: 193
      Abstract: Light, through its non-imaging forming effects, plays a dominant role on a myriad of physiological functions, including the human sleep–wake cycle. The non-image forming effects of light heavily rely on specific properties such as intensity, duration, timing, pattern, and wavelengths. Here, we address how specific properties of light influence sleep and wakefulness in humans through acute effects, e.g., on alertness, and/or effects on the circadian timing system. Of critical relevance, we discuss how different characteristics of light exposure across the 24-h day can lead to changes in sleep–wake timing, sleep propensity, sleep architecture, and sleep and wake electroencephalogram (EEG) power spectra. Ultimately, knowledge on how light affects sleep and wakefulness can improve light settings at home and at the workplace to improve health and well-being and optimize treatments of chronobiological disorders.
      Citation: Clocks & Sleep
      PubDate: 2019-03-13
      DOI: 10.3390/clockssleep1010017
      Issue No: Vol. 1, No. 1 (2019)
  • Clocks & Sleep, Vol. 1, Pages 1-2: Clocks & Sleep: A New Open-Access
           Journal to Publish Your Circadian and Sleep Research Results

    • Authors: Christian Cajochen, Paul Franken
      First page: 1
      Abstract: Exciting new discoveries in the circadian and sleep field have mushroomed in the past 10 years, culminating in the 2017 Nobel Prize in Physiology or Medicine being awarded to Jeffrey C. Hall, Michael Rosbash, and MichaelW. Young for their discoveries of molecular mechanisms controlling the circadian rhythm. [...]
      Citation: Clocks & Sleep
      PubDate: 2018-04-18
      DOI: 10.3390/clockssleep1010001
      Issue No: Vol. 1, No. 1 (2018)
  • Clocks & Sleep, Vol. 1, Pages 3-12: Sleep Quality and Chronotype
           Differences between Elite Athletes and Non-Athlete Controls

    • Authors: Amy M. Bender, Hans P. A. Van Dongen, Charles H. Samuels
      First page: 3
      Abstract: Previous research has found that elite athletes have insufficient sleep, yet the specific kinds of sleep disturbances occurring as compared to a control group are limited. Here we compare the subjective sleep quality and chronotype of elite athletes to a control group of non-athlete good sleepers. Sixty-three winter Canadian National Team athletes (mean age 26.0 ± 0.0; 32% females) completed the Pittsburgh Sleep Quality Index (PSQI) and the Athlete Morningness Eveningness Scale. They were compared to 83 healthy, non-athlete, good-sleeper controls (aged 27.3 ± 3.7; 51% females) who completed the PSQI and the Composite Scale of Morningness. The elite athletes reported poorer sleep quality (PSQI global score 5.0 ± 2.6) relative to the controls (PSQI global score 2.6 ± 1.3), despite there being no group difference in self-reported sleep duration (athletes 8.1 ± 1.0 h; controls 8.0 ± 0.7 h). Further, athletes’ chronotype distribution showed a greater skew toward morningness, despite there being no group differences in self-reported usual bedtime and wake time. These results suggest that a misalignment of sleep times with circadian preference could contribute to poorer sleep quality in elite athletes.
      Citation: Clocks & Sleep
      PubDate: 2018-09-05
      DOI: 10.3390/clockssleep1010002
      Issue No: Vol. 1, No. 1 (2018)
  • Clocks & Sleep, Vol. 1, Pages 13-25: Incidence of Daytime Sleepiness and
           Associated Factors in Two First Nations Communities in Saskatchewan,

    • Authors: Chandima Karunanayake, James Dosman, Donna Rennie, Joshua Lawson, Shelley Kirychuk, Mark Fenton, Vivian Ramsden, Jeremy Seeseequasis, Sylvia Abonyi, Punam Pahwa, The First Nations Lung Health Project Research Team
      First page: 13
      Abstract: Excessive daytime sleepiness (EDS) is the tendency to sleep at inappropriate times during the day. It can interfere with day-to-day activities and lead to several health issues. The objective of this study was to investigate the association between income, housing conditions, and incidence of EDS in adults living in two Cree First Nations communities. The data for this study involved 317 individuals aged 18 years and older who participated in baseline and follow-up evaluations (after four years) of the First Nations Lung Health Project, which was conducted in Saskatchewan in 2012–2013 and 2016. Both at baseline and follow-up survey after four years, an Epworth Sleepiness Scale (ESS) score >10 was considered to be abnormal. Logistic regression models were used to assess relationships between abnormal ESS and covariates at baseline. In 2016, 7.6% (24/317) of the participants reported an ESS >10 with the mean being 12.8 ± 2.0. For the same group, the mean ESS at baseline was 6.9 ± 2.2. The incidence of subjective EDS based on the ESS >10 was estimated at 7.6% over four years. This study showed an association between incidence of subjective EDS and less money left over at end of the month, having a house in need of repairs, having water or dampness in the past 12 months, and damage caused by dampness.
      Citation: Clocks & Sleep
      PubDate: 2018-09-20
      DOI: 10.3390/clockssleep1010003
      Issue No: Vol. 1, No. 1 (2018)
  • Clocks & Sleep, Vol. 1, Pages 26-41: Responses to Intermittent Light
           Stimulation Late in the Night Phase Before Dawn

    • Authors: Sevag Kaladchibachi, David C. Negelspach, Fabian Fernandez
      First page: 26
      Abstract: The circadian clock is comprised of two oscillators that independently track sunset (evening) and sunrise (morning), though little is known about how light responses differ in each. Here, we quantified the morning oscillator’s responses to 19 separate pulse trains, collecting observations from over 1300 Drosophila at ZT23. Our results show that the advances in activity onset produced by these protocols depended on the tempo of light administration even when total exposure was conserved across a 15-min window. Moreover, patterns of stimulation previously shown to optimize the evening oscillator’s delay resetting at ZT13 (an hour after dusk) were equally effective for the M oscillator at ZT23 (an hour before dawn), though the morning oscillator was by comparison more photosensitive and could benefit from a greater number of fractionation strategies that better converted light into phase-shifting drive. These data continue to build the case that the reading frames for the pacemaker’s time-of-day estimates at dusk and dawn are not uniform and suggest that the “photologic” for the evening versus morning oscillator’s resetting might be dissociable.
      Citation: Clocks & Sleep
      PubDate: 2018-09-27
      DOI: 10.3390/clockssleep1010004
      Issue No: Vol. 1, No. 1 (2018)
  • Clocks & Sleep, Vol. 1, Pages 42-49: Objective Food Intake in Night and
           Day Shift Workers: A Laboratory Study

    • Authors: Yichi Chen, Shaza Lauren, Bernard P. Chang, Ari Shechter
      First page: 42
      Abstract: Night shift work is associated with risk of overweight and obesity. In night shift workers, short sleep duration combined with circadian misalignment may contribute to altered food intake regulation, favoring positive energy balance and weight gain. Prior work investigating food intake in shift workers has suffered methodologically due to reliance on subjective self-report for dietary assessment. No study has yet been done to examine the impact of night shift work on food intake in real-life shift workers using objective measures. Female day (n = 12) and night (n = 12) shift workers from a hospital setting participated in a laboratory-based objective food intake assessment. Participants entered the laboratory in the fasted state after awakening from the sleep episode following a final work shift, and underwent an ad libitum 14-item test meal buffet to objectively quantify food choice/intake. Sleep duration (measured via wrist-accelerometry) during the sleep episode before laboratory assessment was significantly longer in day vs. night workers (373.9 ± 127.5 vs. 260.6 ± 102.9 min, p = 0.03). No significant group difference was observed in calories consumed during the test meal (943.08 ± 469.55 vs. 878.58 ± 442.68 kcal, p = 0.74). When expressed as percent of energy consumed, day workers had higher protein consumption vs. night workers (16.03 ± 5.69 vs. 11.82 ± 4.05%; p = 0.05). To our knowledge, this is the first laboratory-based behavioral assessment of food choice/intake in actual night and day shift workers. Although not studied here, work by others has linked protein intake to satiety. This may be a potential pathway placing shift workers at risk for overweight and obesity.
      Citation: Clocks & Sleep
      PubDate: 2018-10-14
      DOI: 10.3390/clockssleep1010005
      Issue No: Vol. 1, No. 1 (2018)
  • Clocks & Sleep, Vol. 1, Pages 50-64: Scale-Free Dynamics of the Mouse
           Wakefulness and Sleep Electroencephalogram Quantified Using

    • Authors: Jean-Marc Lina, Emma Kate O’Callaghan, Valérie Mongrain
      First page: 50
      Abstract: Scale-free analysis of brain activity reveals a complexity of synchronous neuronal firing which is different from that assessed using classic rhythmic quantifications such as spectral analysis of the electroencephalogram (EEG). In humans, scale-free activity of the EEG depends on the behavioral state and reflects cognitive processes. We aimed to verify if fractal patterns of the mouse EEG also show variations with behavioral states and topography, and to identify molecular determinants of brain scale-free activity using the ‘multifractal formalism’ (Wavelet-Leaders). We found that scale-free activity was more anti-persistent (i.e., more different between time scales) during wakefulness, less anti-persistent (i.e., less different between time scales) during non-rapid eye movement sleep, and generally intermediate during rapid eye movement sleep. The scale-invariance of the frontal/motor cerebral cortex was generally more anti-persistent than that of the posterior cortex, and scale-invariance during wakefulness was strongly modulated by time of day and the absence of the synaptic protein Neuroligin-1. Our results expose that the complexity of the scale-free pattern of organized neuronal firing depends on behavioral state in mice, and that patterns expressed during wakefulness are modulated by one synaptic component.
      Citation: Clocks & Sleep
      PubDate: 2018-10-20
      DOI: 10.3390/clockssleep1010006
      Issue No: Vol. 1, No. 1 (2018)
  • Clocks & Sleep, Vol. 1, Pages 65-74: Measuring Food Anticipation in

    • Authors: Tomaz Martini, Jürgen Ripperger, Urs Albrecht
      First page: 65
      Abstract: The interplay between the circadian system and metabolism may give animals an evolutionary advantage by allowing them to anticipate food availability at specific times of the day. Physiological adaptation to feeding time allows investigation of animal parameters and comparison of food anticipation between groups of animals with genetic alterations and/or post pharmacological intervention. Such an approach is vital for understanding gene function and mechanisms underlying the temporal patterns of both food anticipation and feeding. Exploring these mechanisms will allow better understanding of metabolic disorders and might reveal potential new targets for pharmacological intervention. Changes that can be easily monitored and that represent food anticipation on the level of the whole organism are a temporarily restricted increase of activity and internal body temperature.
      Citation: Clocks & Sleep
      PubDate: 2018-10-26
      DOI: 10.3390/clockssleep1010007
      Issue No: Vol. 1, No. 1 (2018)
  • Clocks & Sleep, Vol. 1, Pages 75-86: Prolonged Waking and Recovery Sleep
           Affect the Serum MicroRNA Expression Profile in Humans

    • Authors: Susanne Weigend, Sebastian C. Holst, Josefine Meier, Matthias Brock, Malcolm Kohler, Hans-Peter Landolt
      First page: 75
      Abstract: MicroRNAs (miRNAs) are small, abundant, non-coding RNA fragments that regulate gene expression and silencing at the post-transcriptional level. The miRNAs each control various downstream targets and play established roles in different biological processes. Given that miRNAs were recently proposed to contribute to the molecular control of sleep–wake regulation in animal models and narcoleptic patients, we investigated the impact of acute sleep deprivation on blood miRNA expression in healthy adult men of two different age groups. Twenty-two young (mean age: 24 ± 3 years) and nine older (65 ± 1 years) volunteers completed a controlled in-lab study, consisting of 8 h baseline sleep, followed by 40 h of extended wakefulness, and a 10-h recovery sleep opportunity. At the same circadian time in all three conditions (at 4:23 p.m. ± 23 min), qPCR expression profiling of 86 miRNAs was performed in blood serum. Thirteen different miRNAs could be reliably quantified and were analyzed using mixed-model ANOVAs. It was found that miR-30c and miR-127 were reliably affected by previous sleep and wakefulness, such that expression of these miRNAs was upregulated after extended wakefulness and normalized after recovery sleep. Together with previous findings in narcolepsy patients, our preliminary data indicate that miR-30c and its target proteins may provide a biomarker of elevated sleep debt in humans.
      Citation: Clocks & Sleep
      PubDate: 2018-11-22
      DOI: 10.3390/clockssleep1010008
      Issue No: Vol. 1, No. 1 (2018)
  • Clocks & Sleep, Vol. 1, Pages 87-104: Adult NREM Parasomnias: An

    • Authors: Maria Hrozanova, Ian Morrison, Renata L Riha
      First page: 87
      Abstract: Our understanding of non-rapid eye movement (NREM) parasomnias has improved considerably over the last two decades, with research that characterises and explores the causes of these disorders. However, our understanding is far from complete. The aim of this paper is to provide an updated review focusing on adult NREM parasomnias and highlighting new areas in NREM parasomnia research from the recent literature. We outline the prevalence, clinical characteristics, role of onset, pathophysiology, role of predisposing, priming and precipitating factors, diagnostic criteria, treatment options and medico-legal implications of adult NREM parasomnias.
      Citation: Clocks & Sleep
      PubDate: 2018-11-23
      DOI: 10.3390/clockssleep1010009
      Issue No: Vol. 1, No. 1 (2018)
  • Clocks & Sleep, Vol. 1, Pages 105-116: Delayed Sleep in Winter Related to
           Natural Daylight Exposure among Arctic Day Workers

    • Authors: Arne Lowden, Nelson A. M. Lemos, Bruno S. B. Gonçalves, Gülçin Öztürk, Fernando Louzada, Mario Pedrazzoli, Claudia R. Moreno
      First page: 105
      Abstract: Natural daylight exposures in arctic regions vary substantially across seasons. Negative consequences have been observed in self-reports of sleep and daytime functions during the winter but have rarely been studied in detail. The focus of the present study set out to investigate sleep seasonality among indoor workers using objective and subjective measures. Sleep seasonality among daytime office workers (n = 32) in Kiruna (Sweden, 67.86° N, 20.23° E) was studied by comparing the same group of workers in a winter and summer week, including work and days off at the weekend, using actigraphs (motion loggers) and subjective ratings of alertness and mood. Actigraph analyses showed delayed sleep onset of 39 min in winter compared to the corresponding summer week (p < 0.0001) and shorter weekly sleep duration by 12 min (p = 0.0154). A delay of mid-sleep was present in winter at workdays (25 min, p < 0.0001) and more strongly delayed during days off (46 min, p < 0.0001). Sleepiness levels were higher in winter compared to summer (p < 0.05). Increased morning light exposure was associated with earlier mid-sleep (p < 0.001), while increased evening light exposure was associated with delay (p < 0.01). This study confirms earlier work that suggests that lack of natural daylight delays the sleep/wake cycle in a group of indoor workers, despite having access to electric lighting. Photic stimuli resulted in a general advanced sleep/wake rhythm during summer and increased alertness levels.
      Citation: Clocks & Sleep
      PubDate: 2018-11-30
      DOI: 10.3390/clockssleep1010010
      Issue No: Vol. 1, No. 1 (2018)
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