scholarly journals Effects of Light With Reduced Short Wavelength Components on Parameters of Circadian Rhythm and Performance in an Experimental Night Shift Model

2008 ◽  
Vol 1 (1) ◽  
pp. 34-43 ◽  
Author(s):  
Georg Hoffmann ◽  
Veronika Leichtfried ◽  
Andrea Griesmacher ◽  
Christian Bartenbach ◽  
Markus Canazei ◽  
...  
Keyword(s):  
Circadian Rhythm ◽  
Short Wavelength ◽  
Night Shift ◽  
And Performance ◽  
Shift Model

scholarly journals Effect of Two Different Lighting Environments on Urinary Neopterin and Sulphatoxymelatonin in an Experimental Night Shift Model

Pteridines ◽  
2007 ◽  
Vol 18 (1) ◽  
pp. 69-78 ◽  
Author(s):  
Wolfgang Schobersberger ◽  
Veronika Gufler ◽  
Andrea Griesmacher ◽  
Christian Bartenbach ◽  
Markus Canazei ◽  
...  
Keyword(s):  
Short Wavelength ◽  
Current Knowledge ◽  
Night Shift ◽  
Bright Light ◽  
Chronic Fatigue ◽  
Subjective Perception ◽  
Short Wavelength Range ◽  
Test Light ◽  
Urinary Neopterin ◽  
Shift Model

Abstract Regular night shift activities are associated with a series of adverse effects (e.g. chronic fatigue, increased yield loss rates, diseases) related to a disturbed circadian rhythm of the employee. According to current knowledge, the human circadian system is affected by visible light in the short wavelength range. In the present study, we investigated the effects of reduced short-wavelength components in the lighting environment of an office workplace on circadian markers, symptoms of lassitude, and personal mood in an experimental night shift setup. Nocturnal urinary neopterin excretion was different from known circadian rhythms under both filtered test light and bright light conditions. By contrast, urinary sulphatoxymelatonin concentrations could be adjusted to a normal diurnal profile in the test light environment. Mood rating inventories did not result in differences in the subjective perception between the two lighting environments with respect to the dimensions of "Activity", "Concentration, "Deactivation", and "Fatigue". In addition, changes in signs of vigour and weariness in the course of each night of the study were equally pronounced in test light and bright light. In conclusion, the present study shows that light with reduced short-wavelength components maintains the nocturnal profile of sulphatoxymelatonin but simultaneously exerts a wearisome effect on the participants. Therefore, a general implementation of test light to illuminate night shift workplaces implies further investigations.

Etudes comparées des rythmes circadiens et reflet actimétrique du sommeil de sportifs et de sédentaires en poste régulier de nuit

2003 ◽  
Vol 28 (6) ◽  
pp. 831-887 ◽  
Author(s):  
Benoît Mauvieux ◽  
Laurent Gouthière ◽  
Bruno Sesboüe ◽  
Damien Davenne
Keyword(s):  
Circadian Rhythm ◽  
Circadian Rhythms ◽  
Sleep Quality ◽  
Shift Work ◽  
Physical Training ◽  
Night Shift ◽  
Circadian Variation ◽  
Night Work ◽  
Sedentary Subjects

The aim of this study was to show the resistance and persistence of the circadian rhythm of temperature (T°) and the sleep quality of athletic subjects and sedentary subjects engaged in night work, and attempt to explain the mechanisms that influence these differences. The effects of night work on biological rhythms have been studied extensively in the past few years. The contradictory situations for the night workers irrefutably affect their biological systems. Individuals with high amplitudes in their circadian rhythms have been found to be more tolerant to shift work and this results in a greater stability of circadian rhythms. This seems beneficial in coping with frequent rhythm disturbances. The physical training program seems to improve several mechanisms of the human biological system: amplitudes of circadian rhythms were increased and the circadian rhythm period was more resistant to an environment extreme (night work, shift work, sleep deprivation, or jet lag). To test this hypothesis, athletes and sedentary subjects who were engaged in regular night work were selected in the PSA Peugeot Citroën Automobiles Group in French Normandy country. The circadian rhythm of the T° for both groups was studied with a specific methodology and with extensive spectral analysis, especially the spectral elliptic inverse method. Study models of the rhythm of the T° were determined and the characteristic parameters were exposed. A complementary actigraphic study showed the physical training program's effects on the sleep quality. The results revealed a large stability in the rhythm of circadian variation of T° for the athletes: the amplitude was still large but for the sedentary subjects the amplitude of the T° decreased and it was difficult to adjust a period on the rhythm of T°. The stability and persistent quality of the athletes' circadian rhythm was confirmed. We observed that the actigraphic sleep was greater for athletes than for sedentary subjects, and the acrophase time for the athletes was later than for the sedentary subjects during the night shift. Key words: circadian rhythm of temperature, actimetry, sleep quality, exercise, night work, methodology of rhythms analysis

scholarly journals Excessive mechanical strain accelerates intervertebral disc degeneration by disrupting intrinsic circadian rhythm

2021 ◽  
Author(s):  
Sheng-Long Ding ◽  
Tai-Wei Zhang ◽  
Qi-Chen Zhang ◽  
Wang Ding ◽  
Ze-Fang Li ◽  
...  
Keyword(s):  
Circadian Rhythm ◽  
Intervertebral Disc ◽  
Mechanical Loading ◽  
Disc Degeneration ◽  
Intervertebral Disc Degeneration ◽  
Night Shift ◽  
Mechanical Strain ◽  
Inhibitory Effect ◽  
Shift Workers ◽  
Normal Environment

AbstractNight shift workers with disordered rhythmic mechanical loading are more prone to intervertebral disc degeneration (IDD). Our results showed that circadian rhythm (CR) was dampened in degenerated and aged NP cells. Long-term environmental CR disruption promoted IDD in rats. Excessive mechanical strain disrupted the CR and inhibited the expression of core clock proteins. The inhibitory effect of mechanical loading on the expression of extracellular matrix genes could be reversed by BMAL1 overexpression in NP cells. The Rho/ROCK pathway was demonstrated to mediate the effect of mechanical stimulation on CR. Prolonged mechanical loading for 12 months affected intrinsic CR genes and induced IDD in a model of upright posture in a normal environment. Unexpectedly, mechanical loading further accelerated the IDD in an Light-Dark (LD) cycle-disrupted environment. These results indicated that intrinsic CR disruption might be a mechanism involved in overloading-induced IDD and a potential drug target for night shift workers.

scholarly journals Improving training and support by improving our out of hours handover, Central and North West London NHS Foundation Trust

BJPsych Open ◽  
2021 ◽  
Vol 7 (S1) ◽  
pp. S187-S188
Author(s):  
Mehmet Gez ◽  
Guang Xu
Keyword(s):  
Night Shift ◽  
Learning Opportunities ◽  
Educational Opportunities ◽  
Out Of Hours ◽  
North West ◽  
Qualitative Feedback ◽  
Pdsa Cycle ◽  
And Performance ◽  
Training And Support

AimsDuring out of hour handovers at St Charles Hospital – the two duty SHO (senior house officers) cover on site, whereas the on-call registrar and consultant are available to contact by phone. Some trainees may experience difficulties in contacting their seniors for support, or may not feel comfortable doing so. Trainees may also feel like they would benefit from being more informed of the hospital situation, or added learning and educational opportunities from the shift. The aim of this project was to improve the out of hours support for the on-call SHOs – which we hope to have positive short (such as improving confidence and performance) - and longer-term impacts (improving retention in the deanery and specialty).MethodThe project proposed instating a 15-minute Zoom call at the start of each night shift (9:30pm) which involved the on-call team (SHOs, registrar, consultants and ideally bed managers). Firstly – a survey monkey questionnaire was sent to trainees to gain a baseline on how supported/informed/ease and learning opportunities for that shift. The project then piloted three separate Plan Do Study Act cycles of change and collected feedback from trainees after each cycle. Both qualitative feedback and quantitative feedback from trainees were collected in the Likert scale format after each PDSA cycle.ResultResults showed that a key benefit of this call is that any pressing issues can be brought up and addressed. Furthermore, for the benefit of the trainees, generally trainees felt more supported whilst they are on call, and got to know the fellow on call team. In addition, trainees reported feeling more at ease when calling their senior colleagues.ConclusionIt is particularly important for doctors to feel supported and informed during their on call shift, especially in the current climate, where there are fast changes and adaptations taking place due to the pandemic. By adding a short meeting at the beginning of each night shift, doctors in the hospital demonstrated an increase in feeling supported, informed and having educational opportunities during their on call shifts. In the long term, by addressing on call issues and making trainees feel more confident and supported during their shift, is likely to benefit and improve recruitment and retention.

scholarly journals STABILITY AND INSTABILITY OF AN OUTDOOR ILLUMINATION INSTALLATION

2004 ◽  
Vol 12 (4) ◽  
pp. 115-119
Author(s):  
Klaus-Dieter Fröhner ◽  
Ze Li
Keyword(s):  
Human Performance ◽  
Night Shift ◽  
Lighting Design ◽  
Work Efficiency ◽  
Safety And Health ◽  
Stability And Instability ◽  
Visual Tasks ◽  
And Performance ◽  
The Stability

Stability and instability are very important for the layout of real world processes concerning safety and health esp. when planned by scientists. The long‐term investigation of stability was carried out for the last ten years on the basis of the installation and the evaluation of an ergonomically designed outdoor illumination. In the depicted dynamic situation the lighting design influences directly visual discomfort and human performance and in the end stability and instability. The improvement of the adaptation of luminance and its influence on the visual tasks after the rearrangement are presented and discussed. The effective factors on the visual capability and performance of workers, work efficiency and potential accidents in the night shift, and furthermore the accelerators and barriers for the stability of the project are analysed and discussed.

Relationships of Smartphone Dependence With Chronotype and Gender in Adolescence

2019 ◽  
pp. 39-59 ◽  
Author(s):  
Satoko Ezoe ◽  
Masahiro Toda
Keyword(s):  
Circadian Rhythm ◽  
Sleep Disturbances ◽  
Daily Life ◽  
The Internet ◽  
Communication Tools ◽  
Smartphone Use ◽  
And Performance ◽  
And Gender

Smartphone use has rapidly developed in recent years and become an established part of daily life in many countries. As various applications have been developed as communication tools for use with smartphones, allowing the internet to become more accessible, patterns of dependence have been routinely reported particularly among adolescents. In this chapter, the authors reviewed the previous studies about the relationships of smartphone dependence to chronotype and gender among adolescents. Chronotype refers to preference for sleep-wake timing: for example, morning types go to bed, get up, and experience peak alertness and performance earlier in the day than do evening types. It was found that the light emitted from media screen in the evening before bedtime may delay the circadian rhythm. In addition, excessive smartphone use may lead to sleep disturbances. Recent studies suggested that evening types and females may be more prone to become smartphone dependent.

scholarly journals The Effect of Shift Work and Poor Sleep on Self-Reported Skin Conditions: A Survey of Call Center Agents in the Philippines

2019 ◽  
Vol 1 (2) ◽  
pp. 273-279 ◽  
Author(s):  
Francine Lu ◽  
Amanda Suggs ◽  
Harib Ezaldein ◽  
Jason Ya ◽  
Pingfu Fu ◽  
...  
Keyword(s):  
Circadian Rhythm ◽  
Shift Work ◽  
Skin Disease ◽  
Call Center ◽  
Night Shift ◽  
The Philippines ◽  
Poor Sleep ◽  
Shift Workers ◽  
Significant Difference ◽  
Skin Conditions

Night shift workers may have a disrupted circadian rhythm, which may contribute to the development of skin disease. The purpose of this study was to determine whether there is a significant difference in the prevalence and severity of self-reported skin disease between “regular” day shift workers compared to “graveyard” night shift workers. We conducted surveys from 630 call center agents in Manila, the Philippines, and they were analyzed regarding demographics, medical history, dermatologic history, lifestyle, and sleep. No difference was found in the prevalence of skin disease between shifts. However, night shift workers were worse sleepers. When compared to good sleepers, poor sleepers had a higher prevalence of skin disease with worse severity. Graveyard shift workers with poor sleep may have increased skin disease severity.

Sign in / Sign up

Export Citation Format

Share Document