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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Rela??o entre o ciclo sono e vig?lia e a fun??o cardiorrespirat?ria em estudantes de medicina

Xavier, Rafaella Kaline Costa 08 October 2010 (has links)
Made available in DSpace on 2014-12-17T15:37:02Z (GMT). No. of bitstreams: 1 RafaellaKCX_DISSERT.pdf: 4153211 bytes, checksum: 487a3fa8cb1fb3468a4d19868f6701a0 (MD5) Previous issue date: 2010-10-08 / Students, normally, present an irregular sleep pattern characterized by delays in sleep onset and offset from weekdays to weekends, short sleep duration on weekdays and long sleep duration on weekends. The reduction of the necessary sleep and the irregularity in the sleep patterns provoke relevant short- and long-term impairments on performances, for example, in cardiorespiratory function. The cardiorespiratory performance represents, in addition to fitness, traces associated to health conditions and in several studies to pattern and/or individual s sleep quality. The aim of this study was to evaluate the pattern of the sleep-wake cycle and the cardiorespiratory function of medical students under different class schedules. The study was accomplished with two classes of medical students of UFRN, one had classes at 7 am (n = 47) and the second had classes at 8 am (n = 41) during the week. On the first stage of the study all volunteers filled out an anamnesis, the International Physical Activity questionnaire, the Pittsburgh index of sleep quality, the Portuguese version of the Horne and ?stberg cronotype questionnaire, the Health and Sleep questionnaire and the Epworth Scale of Somnolence (ESS). On the second stage, 24 students (12 of each class) had their activity rhythm monitored by actimeters set to record activity at a 2-min interval for 14 days concomitant to the completion of the sleep diary. In this same stage, each volunteer performed the effort test (treadmill) only once in the morning period (between 9:00 and 11:00). The students showed an irregular pattern of the sleep-wake cycle and this irregularity is strongly influenced by the class schedules, in addition to the contribution of the academic demand, social activities and endogenous factors. The students who woke up earlier showed greater irregularity in the sleep-wake pattern. The earlier was the class schedule the worse was the sleep quality and the greater was the frequency of students with excessive diurnal somnolence. The classes schedules and the irregular pattern of the sleep-wake cycle did not show effect on the cardiorespiratory performance of the medical students. The performance on the test seems to be affected by other factors, which can be related to the pattern of the sleep-wake cycle or not. Therefore, it is suggested that the late start of classes provokes less irregularity on the pattern of the sleep-wake cycle. However, it was observed that this irregularity and the class schedule seem not to affect the cardiorespiratory performance directly / Os estudantes, normalmente, apresentam um padr?o de sono irregular caracterizado por atrasos de in?cio e final do sono dos dias de semana para os finais de semana, curta dura??o de sono nos dias de semana e longa dura??o de sono nos finais de semana. A redu??o do sono necess?rio na semana e a consequente irregularidade no ciclo sono e vig?lia (CSV) provocam detrimentos relevantes a curto e longo prazo no desempenho dos estudantes, como por exemplo, na fun??o cardiorrespirat?ria. O condicionamento cardiorrespirat?rio representa al?m do condicionamento f?sico, tra?os associados ?s condi??es de sa?de e, em muitos estudos, no padr?o e/ou qualidade do sono de um indiv?duo. O objetivo desse estudo foi avaliar o padr?o do ciclo sono e vig?lia e a fun??o cardiorrespirat?ria de estudantes de medicina em diferentes esquemas de hor?rios de aulas. O estudo foi realizado com duas turmas de estudantes de medicina da UFRN, uma assistia aula ?s 7h (n=47) e a outra assistia aula ?s 8h (n=41) durante a semana. Na 1? etapa do estudo todos os volunt?rios responderam uma anamnese, o Question?rio Internacional de Atividade F?sica, o ?ndice de Qualidade do Sono de Pittsburgh, a vers?o em portugu?s do question?rio de Cronotipo de Horne e ?stberg, o question?rio a Sa?de e o sono e a escala de sonol?ncia de Epworth. Na segunda etapa, 24 alunos (12 de cada turma) tiveram o ritmo de monitorado por act?metros com 2min de intervalo, por 14 dias, concomitante ao preenchimento do di?rio do sono. Nesse mesmo per?odo, cada volunt?rio fez o teste de esfor?o (esteira ergom?trica) uma ?nica vez, sempre no per?odo da manh? (entre 9h e 11h). Os estudantes apresentam um padr?o irregular do CSV e essa irregularidade e fortemente vinculada aos hor?rios de aula, al?m da contribui??o da demanda acad?mica, atividades sociais e fatores end?genos. Os alunos que acordam mais cedo apresentam maior irregularidade no padr?o de CSV. Quanto mais cedo o hor?rio de aulas pior a qualidade do sono e maior a frequ?ncia de estudantes com sonol?ncia diurna excessiva. Os hor?rios de aula e o padr?o irregular do CVS n?o mostraram efeito sob o desempenho cardiorrespirat?rio dos estudantes de medicina. O desempenho no teste parece ser afetado por outros fatores, que podem ser relacionados ao padr?o do CSV ou n?o. Assim, sugere-se que o in?cio tardio das aulas provoca menor irregularidade no padr?o do CSV, por?m, observou-se que essa irregularidade e o hor?rio de aula parece n?o afetar a desempenho cardiorrespirat?rio diretamente

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