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https://www.readbyqxmd.com/read/28282858/the-impact-of-shiftwork-on-skeletal-muscle-health
#1
REVIEW
Brad Aisbett, Dominique Condo, Evelyn Zacharewicz, Séverine Lamon
(1) Background: About one in four workers undertake shift rosters that fall outside the traditional 7 a.m.-6 p.m. scheduling. Shiftwork alters workers' exposure to natural and artificial light, sleep patterns, and feeding patterns. When compared to the rest of the working population, shiftworkers are at a greater risk of developing metabolic impairments over time. One fundamental component of metabolic health is skeletal muscle, the largest organ in the body. However, cause-and-effect relationships between shiftwork and skeletal muscle health have not been established; (2) Methods: A critical review of the literature was completed using online databases and reference lists; (3) Results: We propose a conceptual model drawing relationships between typical shiftwork consequences; altered light exposure, sleep patterns, and food and beverage consumption, and drivers of skeletal muscle health-protein intake, resistance training, and hormone release...
March 8, 2017: Nutrients
https://www.readbyqxmd.com/read/28220912/shift-schedule-work-family-relationships-marital-communication-job-satisfaction-and-health-among-transport-service-shift-workers
#2
Irena Iskra-Golec, Lawrence Smith, Ewa Wilczek-Rużyczka, Patrycja Siemiginowska, Joanna Wątroba
OBJECTIVES: Existing research has documented that shiftwork consequences may depend on the shift system parameters. Fast rotating systems (1-3 shifts of the same kind in a row) and day work have been found to be less disruptive biologically and socially than slower rotating systems and afternoon and night work. The aim of this study was to compare day workers and shift workers of different systems in terms of rotation speed and shifts worked with regard to work-family and family-work positive and negative spillover, marital communication style, job satisfaction and health...
February 21, 2017: International Journal of Occupational Medicine and Environmental Health
https://www.readbyqxmd.com/read/28211842/assessment-of-upper-limb-musculoskeletal-pain-and-posture-in-workers-of-packaging-units-of-pharmaceutical-industries
#3
Yasser Labbafinejad, Hossein Danesh, Zahra Imanizade
BACKGROUND: Work-related musculoskeletal disorders are defined as the disabling or painful injury to the muscles, nerves or tendons that are caused by work or aggravated by it. Some studies confirm the association between working in packaging units in various industries and the pain in the upper limb, but also there are controversies about the possible risk factors among different working populations. OBJECTIVE: The present study aims to define the potential ergonomic risk factors for musculoskeletal pain in the upper limb...
February 17, 2017: Work: a Journal of Prevention, Assessment, and Rehabilitation
https://www.readbyqxmd.com/read/28177907/genetic-variation-of-clock-genes-and-cancer-risk-a-field-synopsis-and-meta-analysis
#4
Clara Benna, Charlotte Helfrich-Förster, Senthilkumar Rajendran, Halenya Monticelli, Pierluigi Pilati, Donato Nitti, Simone Mocellin
BACKGROUND: The number of studies on the association between clock genes' polymorphisms and cancer susceptibility has increased over the last years but the results are often conflicting and no comprehensive overview and quantitative summary of the evidence in this field is available. RESULTS: Literature search identified 27 eligible studies comprising 96756 subjects (cases: 38231) and investigating 687 polymorphisms involving 14 clock genes. Overall, 1025 primary and subgroup meta-analyses on 366 gene variants were performed...
February 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/28166415/adverse-metabolic-and-mental-health-outcomes-associated-with-shiftwork-in-a-population-based-study-of-277-168-workers-in-uk-biobank
#5
Cathy A Wyse, Carlos A Celis Morales, Nicolas Graham, Yu Fan, Joey Ward, Anne M Curtis, Daniel Mackay, Daniel J Smith, Mark E S Bailey, Stephany Biello, Jason M R Gill, J P Pell
BACKGROUND: Reported associations between shiftwork and health have largely been based on occupation-specific, or single sex studies that might not be generalizable to the entire working population. The objective of this study was to investigate whether shiftwork was independently associated with obesity, diabetes, poor sleep and well-being in a large, UK general population cohort. METHODS: Participants of the UK Biobank study who were employed at the time of assessment were included...
February 6, 2017: Annals of Medicine
https://www.readbyqxmd.com/read/27995401/shiftwork-is-not-associated-with-increased-risk-of-nafld-findings-from-the-national-health-and-nutrition-examination-survey
#6
Maya Balakrishnan, Hashem B El-Serag, Fasiha Kanwal, Aaron P Thrift
AIMS: There is increased focus on the metabolic impact of shiftwork, especially given the significant number of employees who work nighttime or rotating shifts. Nonalcoholic fatty liver disease (NAFLD) is the hepatic manifestation of the metabolic syndrome. We conducted a cross-sectional study to examine the association between shiftwork and the risk of NAFLD. METHODS: We used aggregated data from the 2005-2006, 2007-2008, and 2009-2010 cycles of the National Health and Nutrition Examination Survey (NHANES)...
December 19, 2016: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/27870902/sleep-duration-exercise-shift-work-and-polycystic-ovarian-syndrome-related-outcomes-in-a-healthy-population-a-cross-sectional-study
#7
Audrey J R Lim, Zhongwei Huang, Seok Eng Chua, Michael S Kramer, Eu-Leong Yong
CONTEXT: Few studies have examined the associations between sleep duration, shiftwork, and exercise to the infrequent menstruation, hyperandrogenism, and ovarian morphological changes observed in women with polycystic ovarian syndrome (PCOS). OBJECTIVE: To examine whether lifestyle factors, including short sleep duration, insufficient exercise, and shiftwork, alone or in combination, are associated with the reproductive and metabolic abnormalities typical of PCOS in a healthy population...
2016: PloS One
https://www.readbyqxmd.com/read/27869241/new-market-labor-and-obesity-a-nation-wide-italian-cross-sectional-study
#8
Pamela Barbadoro, Elisa Ponzio, Carlos Juan Chiatti, Francesco Di Stanislao, Marcello Mario D'Errico, Emilia Prospero
OBJECTIVES: To investigate the prevalence of obesity among different types of employment status in the Italian working population, and to examine associated risk factors. MATERIAL AND METHODS: Cross-sectional survey of 36 814 people that declared to have been occupied with the same type of contract for at least 5 years was analyzed. Multivariable logistic regression models were built considering workers' sex, age, education, family body mass index (BMI) category, leisure time and occupational physical activity, weight control habits, smoking habit, use of drugs, number of working hours per week, and type of working contract...
November 18, 2016: International Journal of Occupational Medicine and Environmental Health
https://www.readbyqxmd.com/read/27736177/it-s-not-just-what-you-eat-but-when-the-impact-of-eating-a-meal-during-simulated-shift-work-on-driving-performance
#9
Charlotte C Gupta, Jill Dorrian, Crystal L Grant, Maja Pajcin, Alison M Coates, David J Kennaway, Gary A Wittert, Leonie K Heilbronn, Chris B Della Vedova, Siobhan Banks
Shiftworkers have impaired performance when driving at night and they also alter their eating patterns during nightshifts. However, it is unknown whether driving at night is influenced by the timing of eating. This study aims to explore the effects of timing of eating on simulated driving performance across four simulated nightshifts. Healthy, non-shiftworking males aged 18-35 years (n = 10) were allocated to either an eating at night (n = 5) or no eating at night (n = 5) condition. During the simulated nightshifts at 1730, 2030 and 0300 h, participants performed a 40-min driving simulation, 3-min Psychomotor Vigilance Task (PVT-B), and recorded their ratings of sleepiness on a subjective scale...
2017: Chronobiology International
https://www.readbyqxmd.com/read/27633225/determinants-of-sleepiness-at-work-among-railway-control-workers
#10
Teresa Cotrim, José Carvalhais, Catarina Neto, Júlia Teles, Paulo Noriega, Francisco Rebelo
In the last two decades the control of the Portuguese railway network has become much more centralized in three centres, there integrating the functions of route flow management, electrical control and signalling. This study aimed to investigate the influence of work and individual determinants in sleepiness among railway control workers, namely socio-demographic factors, work ability, psychosocial factors, shiftwork characteristics, fatigue perception, and sleep. Sleepiness by shift was associated with quality of sleep, job satisfaction, fatigue perception, quantitative demands, and age...
January 2017: Applied Ergonomics
https://www.readbyqxmd.com/read/27633207/cognitive-consequences-of-sleep-deprivation-shiftwork-and-heat-exposure-for-underground-miners
#11
Glenn Legault, Alexandra Clement, Glen P Kenny, Stephen Hardcastle, Nancy Keller
Sleep deprivation, abnormal sleep patterns arising from working rotating shifts, and exposure to high ambient temperatures contribute to physical and cognitive dysfunction. We examined the effects of these on 19 (41.5 ± 5.1 years) male underground miners. Data were collected for 28 to 30 consecutive days such that the participants experienced their full rotating shift schedule, including days off. Objective measures of sleep quality (actigraphy), attentional capacity (psychomotor vigilance task), core body temperature (visceral pill), executive function (BRIEF-A) and subjective measures of fatigue (Karolinska and Epworth Sleepiness scales) were obtained over the 28-30 day period...
January 2017: Applied Ergonomics
https://www.readbyqxmd.com/read/27609325/sleep-related-problems-in-the-us-working-population-prevalence-and-association-with-shiftwork-status
#12
Lee C Yong, Jia Li, Geoffrey M Calvert
OBJECTIVE: To estimate the prevalence of a comprehensive set of self-reported sleep problems by job characteristics, including shiftwork status, among a representative sample of US workers. METHODS: Data for 6338 workers aged ≥18 years were obtained from the National Health and Nutrition Examination Survey. Short sleep duration was defined as <7 hours per weekday/workday. Sleep quality was categorised as good, moderate and poor based on the frequency of 6 sleep-related symptoms...
September 8, 2016: Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/27597890/comparison-of-sleep-quality-based-on-direction-of-shift-rotation-in-electronics-workers
#13
Youil Shon, Seungho Ryu, Byung-Seong Suh, Soo-Geun Kim, Won-Sool Kim, Hee-Seung Son, Hee-Yun Kim, Han-Seur Jeong
BACKGROUND: Previous studies have reported the effects of direction of shift rotation on sleep, however, the findings are inconsistent. In this study, we investigated sleep quality related to direction of shift rotation using large-scale data from shiftwork-specific health examinations of electronics workers. METHODS: This study included 4750 electronics workers working in a rotating 3-shift system who completed a medical examination for shift workers survey from January 1 to December 31, 2014, at a general hospital...
2016: Annals of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/27580590/sleep-patterns-among-shift-working-flight-controllers-of-the-international-space-station-an-observational-study-on-the-jaxa-flight-control-team
#14
Koh Mizuno, Akiko Matsumoto, Tatsuya Aiba, Takashi Abe, Hiroshi Ohshima, Masaya Takahashi, Yuichi Inoue
BACKGROUND: Flight controllers of the International Space Station (ISS) are engaged in shift work to provide 24-h coverage to support ISS systems. The purpose of this study was to investigate the prevalence and associated factors of shift work sleep disorder (SWSD) among Japanese ISS flight controllers. METHODS: A questionnaire study was conducted using the Standard Shiftwork Index to evaluate sleep-related problems and possible associated variables. Among 52 respondents out of 73 flight controllers, 30 subjects were identified as night shift workers who worked 3 or more night shifts per month...
September 1, 2016: Journal of Physiological Anthropology
https://www.readbyqxmd.com/read/27563919/the-relationships-between-human-fatigue-and-public-health-a-brief-commentary-on-selected-papers-from-the-9th-international-conference-on-managing-fatigue-in-transportation-resources-and-health
#15
EDITORIAL
Charli Sargent, Paul Roberts, Drew Dawson, Sally Ferguson, Lynn Meuleners, Libby Brook, Gregory D Roach
The 9th International Conference on Managing Fatigue in Transportation, Resources and Health was held in Fremantle, Western Australia in March 2015. The purpose of the conferences in this series is to provide a forum for industry representatives, regulators, and scientists to discuss recent advances in the field of fatigue research. We have produced a Special Issue of the International Journal of Environmental Research and Public Health based on papers from the conference that were focused on various aspects of public health...
August 24, 2016: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/27562056/feeding-during-the-resting-phase-causes-profound-changes-in-physiology-and-desynchronization-between-liver-and-muscle-rhythms-of-rats
#16
Anne-Loes Opperhuizen, Dawei Wang, Ewout Foppen, Remi Jansen, Olga Boudzovitch-Surovtseva, Janneke de Vries, Eric Fliers, Andries Kalsbeek
Shiftworkers run an increased risk of developing metabolic disorders, presumably as a result of disturbed circadian physiology. Eating at a time-of-day that is normally dedicated to resting and fasting, may contribute to this association. The hypothalamus is the key brain area that integrates different inputs, including environmental time information from the central biological clock in the suprachiasmatic nuclei, with peripheral information on energy status to maintain energy homeostasis. The orexin system within the lateral hypothalamus is an important output of the suprachiasmatic nuclei involved in the control of sleep/wake behavior and glucose homeostasis, among other functions...
November 2016: European Journal of Neuroscience
https://www.readbyqxmd.com/read/27439492/clock-genes-and-salt-sensitive-hypertension-a-new-type-of-aldosterone-synthesizing-enzyme-controlled-by-the-circadian-clock-and-angiotensin-ii
#17
Hitoshi Okamura, Masao Doi, Kaoru Goto, Rika Kojima
With the current societal norm of shiftwork and long working hours, maintaining a stable daily life is becoming very difficult. An irregular lifestyle disrupts circadian rhythms, resulting in the malfunction of body physiology and ultimately leading to lifestyle-related diseases, including hypertension. By analyzing completely arrhythmic Cry1/Cry2 double-knockout (Cry-null) mice, we found salt-sensitive hypertension accompanied by hyperaldosteronism. On the basis of a DNA microarray analysis of the adrenal gland and subsequent biochemical analyses, we discovered that Hsd3b6/HSD3B1, a subtype of 3β-HSD, is markedly overexpressed in aldosterone-producing cells in the Cry-null adrenal cortex...
October 2016: Hypertension Research: Official Journal of the Japanese Society of Hypertension
https://www.readbyqxmd.com/read/27432116/sleep-propensity-under-forced-desynchrony-in-a-model-of-arousal-state-dynamics
#18
Svetlana Postnova, Steven W Lockley, Peter A Robinson
An improvement to our current quantitative model of arousal state dynamics is presented that more accurately predicts sleep propensity as measured with sleep dynamics depending on circadian phase and prior wakefulness. A nonlinear relationship between the circadian variables within the dynamic circadian oscillator model is introduced to account for the skewed shape of the circadian rhythm of alertness that peaks just prior to the onset of the biological night (the "wake maintenance zone") and has a minimum toward the end of the biological night...
October 2016: Journal of Biological Rhythms
https://www.readbyqxmd.com/read/27391478/sleep-fatigue-and-quality-of-life-a-comparative-analysis-among-night-shift-workers-with-and-without-children
#19
Silvio Araújo Fernandes-Junior, Francieli Silva Ruiz, Leandro Stetner Antonietti, Sergio Tufik, Marco Túlio de Mello
INTRODUCTION: The reversal of the natural cycle of wakefulness and sleep may cause damage to the health of workers. However, there are few studies evaluating sleep, fatigue and quality of life of night shift workers considering the influence of small children on these variables. AIMS: Evaluate the sleep time, fatigue and quality of life of night shift workers and verify the relationship between these variables with the presence or absence of children in different age groups...
2016: PloS One
https://www.readbyqxmd.com/read/27341143/22nd-international-symposium-on-shiftwork-and-working-time-challenges-and-solutions-for-healthy-working-hours
#20
Kimberly A Honn, Anne Helene Garde, Frida Marina Fischer, Hans P A Van Dongen
No abstract text is available yet for this article.
2016: Chronobiology International
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