Relation entre le chronotype, le sommeil, la fatique et l'exposition à la lumière chez les jeunes adultes travailleurs aux études

Authors: Martin, Jeanne Sophie
Advisor: Hébert, MarcLaberge, Luc
Abstract: The objective of this master thesis was to evaluate the relationship between chronotype, exposure to light, work-related fatigue and sleep problems in 97 young adults aged 19-21 years who combine their studies with participation in paid work. The research question is based on the fact that several students combine school and work and that many of them report cutting on sleep in order to complete their daily tasks and activities efficiently. Also, the transition to adulthood brings significant changes in sleep patterns and circadian rhythms. Although sleep needs reportedly remain unchanged throughout adolescence, the onset of puberty is characterized by a propensity to delay wake times and bed times. These changes are caused by biological and social processes and can lead to the build-up of a sleep debt and, consequently, sleepiness and fatigue. One may thus advance that an intensification of school and work activities for this population may increase this sleep debt and concomitant symptoms of sleep deprivation. In this study, the chronotype (or "circadian preference") is evaluated as a factor that can influence sleep problems of student workers. Several publications have highlighted that students who have evening chronotype (or having a later circadian preference) have more problems related to sleep and daytime functioning than other students. It is therefore relevant to assess chronotype in student workers for its potential protective or deleterious effect on sleep and fatigue. The level of environmental light exposure was also evaluated, since light is the most important exogenous synchronizer of the circadian system. In summary, the results of this study underline that young adults are likely to exhibit a significant sleep debt when they work while studying. Furthermore, the results indicate that student workers with an evening chronotype is associated with lower sleep quality, higher level of work-related chronic fatigue and distinct patterns of light exposure such as lower light exposure during the morning and the afternoon.
Document Type: Mémoire de maîtrise
Issue Date: 2013
Open Access Date: 19 April 2018
Grantor: Université Laval
Collection:Thèses et mémoires

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