Made available in DSpace on 2014-12-17T15:16:13Z (GMT). No. of bitstreams: 1 PatriciaVNN_DISSERT.pdf: 1343694 bytes, checksum: 3e4c49a6f2684888a59c1621bc5412b2 (MD5) Previous issue date: 2011-04-01 / Introduction: The aging process causes quantitative and qualitative changes in sleeping. Such changes affects more than half of the adults above 65 years old, that live in the community and 70% of the institutionalized, a great negative impact in their quality of life. One of the pathological displays of aging, that share some characteristics with sleeping disorders and predict similar results, is the Frailty Syndrome, that characterize the most weakened and vulnerable elderly. The way sleeping disorders play a role in the frailty pathogeneses remains uncertain. Objective: Evaluate the relation between the sleeping and the frailty syndrome on institutionalized elderly. Methodology: A transversal study was performed with 69 elderly in institutions in the city of Jo?o Pessoa PB. Were used the Pittsburgh Sleeping Quality Index and actigraphy to subjective and objective variables, respectively, and questionnaires and specific tests to frailty phenotype variant (Fried Frailty Criteria). In the statistic analysis were used the Pearson correlation test, Chi Square and One-way ANOVA test, with Tukey-Krammer posttest. Subsequently, a Simple Linear Regression model was built. On every statistical analysis were considered a confidence interval of 95% and a p < 0,05. Results: The sample was characterized by the prevalence of the frail (49,3%), women (62,3%), single (50,7%) and 77,52 (?7,82).The frail elderly obtained the worst sleeping quality 10,37 (?4,31) (f = 4,15, p = 0,02), when compared with the non-frail. The sleep latency influenced more the frailty (R2 = 0,13, &#946; standard = 1,76, &#946; = 0,41, p = 0,001). Weren t found differences between the standard resting-activity variable and the frailty phenotype categories. Conclusion: Sleeping alterations, including bad sleeping quality, prolonged sleep latency, low sleep efficiency and day drowsiness, influenced the frailty in institutionalized elderly / Introdu??o: O processo de envelhecimento ocasiona modifica??es na quantidade e qualidade do sono. Tais modifica??es afetam mais da metade dos adultos acima de 65 anos de idade, que vivem na comunidade e 70% dos institucionalizados, gerando impacto negativo na sua qualidade de vida. Uma das manifesta??es patol?gicas do envelhecimento que compartilha algumas caracter?sticas com as desordens do sono e prediz resultados similares ? a S?ndrome da Fragilidade, que caracteriza os idosos mais debilitados e vulner?veis. A maneira como os transtornos do sono desempenham um papel na patog?nese da fragilidade permanece incerta. Objetivo: Avaliar a rela??o entre sono e s?ndrome da fragilidade em idosos institucionalizados. Metodologia: Foi realizado um estudo transversal, com 69 idosos residentes em institui??es no munic?pio de Jo?o Pessoa - PB. Foram utilizados ?ndice de Qualidade de Sono de Pittsburgh e actigrafia para as vari?veis subjetivas e objetivas do sono, respectivamente, e question?rios e testes espec?ficos para as vari?veis do fen?tipo de fragilidade (crit?rios de fragilidade de Fried). Na an?lise estat?stica utilizou-se o teste de correla??o de Pearson, teste Qui Quadrado e ANOVA One-way, com p?steste de Tukey-Kramer. Posteriormente, foi constru?do um modelo de Regress?o Linear Simples. Em toda an?lise estat?stica foi considerado um intervalo de confian?a de 95% e um p < 0,05. Resultados: A amostra foi caracterizada pelo predom?nio de fr?geis (49,3%), mulheres (62,3%), de solteiros (50,7%) e m?dia de idade de 77,52 (?7,82). Os idosos fr?geis obtiveram pior qualidade de sono, 10,37 (?4,31) (f = 4,15, p = 0,02), quando comparados aos n?o fr?geis. A lat?ncia do sono foi a que mais influenciou a fragilidade (R2 = 0,13, &#946; padr?o = 1,76, &#946; = 0,41, p = 0,001). N?o foram encontradas diferen?as entre as vari?veis do padr?o repouso-atividade e as categorias do fen?tipo de fragilidade. Conclus?o: As altera??es do sono, incluindo m? qualidade de sono, lat?ncia de sono prolongada, baixa efici?ncia de sono e sonol?ncia diurna, influenciam a fragilidade em idosos institucionalizados

Made available in DSpace on 2014-12-17T15:16:17Z (GMT). No. of bitstreams: 1 PaulaRAC_DISSERT.pdf: 2213366 bytes, checksum: a9accf8bb784fa5677e03b9167cc65c6 (MD5) Previous issue date: 2009-07-10 / The cerebral vascular accident is a neurological dysfunction of vascular origin that leds to development of motor sensibility, cognitive, perceptive and language deficits. Despite the fact that the main sleep disorders in stroke patients are well known, it is still necessary to analyze which mechanisms of regulation of sleep and wakefulness are affected. The objective of this study was to evaluate the changes in the circadian and homeostatic control of sleep-wakefulness in stroke patients and the correlations with quality of life and level of physical activity. The study analyzed 22 stroke patients (55? 12 years old) and 24 healthy subjects (57 ?11 years old). The instruments used in this study were questionnaires on sleep quality, daytime sleepiness, quality of life, physical activity level and the actigraphy. The data were analyzed using the Student `t test, Mann-Whitney test, ANOVA and Spearman's correlation tests. The results showed stability in the sleep-wake circadian expression with changes in the amplitude of the rhythm. However, significant changes were found related to the homeostatic component characterized by increased sleep duration, increased latency, fragmented sleep and lower sleep efficiency. Additional data showed decreased quality of sleep and increased daytime sleepiness, as well as decreased quality of life and level of physical activity. The results indicate that the interaction of circadian and homeostatic control of sleep-wake is compromised and the main reason might be because of the homeostatic component and the lower activity level resulting from the brain damage. Thus, further studies may be developed to evaluate whether behavioral interventions such as increased daytime activity and restriction of sleep during the day can influence the homeostatic process and its relation to circadian component, resulting in improved quality of nocturnal sleep in stroke patients / O Acidente Vascular Encef?lico (AVE) ? uma disfun??o neurol?gica de origem vascular com desenvolvimento de d?ficits sens?riomotores, cognitivo, perceptivo e da linguagem. Apesar de serem conhecidas as principais altera??es do sono nos pacientes com AVE, ainda ? necess?rio analisar quais mecanismos da regula??o do sono e vig?lia est?o afetados. O objetivo deste estudo foi avaliar as altera??es do controle circadiano e homeost?tico do sono-vig?lia em pacientes com AVE e as correla??es com a qualidade de vida e o n?vel de atividade f?sica. Participaram do estudo 22 pacientes (55?12 anos) e 24 sujeitos saud?veis (57?11 anos). Os instrumentos utilizados neste estudo foram os question?rios sobre a qualidade do sono, sonol?ncia diurna, qualidade de vida, n?vel de atividade f?sica e a actimetria. Os dados foram analisados atrav?s do teste t`Student, teste de Mann-Whitney, ANOVA e teste de correla??o de Spearman. Os resultados encontrados no estudo apontaram estabilidade da express?o circadiana do sono-vil?gia com altera??o na amplitude do ritmo. Entretanto, foram encontradas altera??es homeost?ticas significativas relacionadas com maior dura??o do sono, lat?ncia e fragmenta??o do sono, assim como menor efic?ncia. Dados adicionais mostraram comprometimento da qualidade do sono e aumento da sonol?ncia diurna, assim como diminui??o da qualidade de vida e do n?vel de atividade f?sica. Os resultados observados indicam comprometimento da intera??o do controle circadiano e homeost?tico do sono-vig?lia desencadeado principalmente pelo homeost?tico e diminui??o do n?vel de atividade consequentes da les?o cerebral ocorrida. Dessa forma, estudos posteriores podem ser desenvolvidos a fim avaliar se interven??es comportamentais, como aumento da atividade diurna e restri??o do sono durante o dia, podem influenciar o processo homeost?tico e sua rela??o com o circadiano resultando em melhoria da qualidade do sono noturno em pacientes com AVE

Made available in DSpace on 2014-12-17T15:36:59Z (GMT). No. of bitstreams: 1 JaneCS_DISSERT.pdf: 1336075 bytes, checksum: c5f6533c7142c09470c15e67f89d8cd4 (MD5) Previous issue date: 2010-05-04 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / In the school environment is fundamental the knowledge about the sleep-wake cycle (SWC), because we find children and adolescents with excessive sleepiness and learning difficulties. Furthermore, teachers with high demand and with different work schedule, which may contribute to changes in SWC. The aim of this study was to describe the SWC of high school teachers in Natal/RN. Habits and knowledge about sleep, chronotype, SWC, daytime sleepiness, sleep quality and job satisfaction were described in 98 high school teachers from public and private school. These parameters were compared according to the characteristics of work, family structure and gender. Data collection was performed with the use of questionnaires in two stages: 1) "health and sleep" (general characterization of sleep habits), Horne & Ostberg questionnaire (characterization of chronotype), Epworth Sleepiness Scale and the Index of Pittsburg Sleep Quality, 2) The sleep diary for 14 days. From the results, we observe that the teachers woke up and went to bed earlier in the week and showed a reduction of time in bed around 42min comparing to weekend. This reduction in time in bed during the week was accompanied by an increase in nap duration on weekend. In addition the teachers woke up earlier on Saturdays than on Sundays, probably due to housework and leisure. The teachers' knowledge about sleep was low in relation to individual differences and effect of alcoholic beverages on sleep, and high in the consequences of sleep deprivation. The differences found in comparisons on the characteristics of work, family structure and gender were punctual, except concerning the work schedule. The teacher who started work in the morning and finished in the night, woke up earlier, went to bed later and had less time in bed, when compared to teachers who work only in two shifts. In addition, teachers with late chronotypes who begin the work in the morning had a greater irregularity in the wake up time compared to teachers with earlier and intermediate chronotypes. Half of teachers have excessive sleepiness, which was positive correlated with work dissatisfaction. In general, teachers showed IPSQ averages equivalent to poor sleep quality and the women showed worst averages. From the results, it is suggested that the SWC of teachers varies according to work schedule, leading to irregularity and partial sleep deprivation in the week, although these responses vary according to chronotype. These changes are accompanied by excessive daytime sleepiness and poor sleep quality. However, it is necessary to expand the sample to clarify the influence of variables related to work, family structure and gender together / No ambiente escolar ? de fundamental import?ncia o conhecimento sobre o ciclo sono e vig?lia (CSV), pois encontramos crian?as e adolescentes com sonol?ncia excessiva e dificuldades de aprendizagem, al?m de professores com alta demanda e hor?rio diferenciado de trabalho, o que pode contribuir para o surgimento de altera??es no CSV. O objetivo deste estudo foi caracterizar o CSV de professores do ensino m?dio de Natal/RN. Participaram da pesquisa 98 professores de escolas p?blicas e privadas, dos quais, foram descritos os h?bitos e conhecimentos sobre o sono, cronotipo, padr?o do CSV, n?veis de sonol?ncia diurna, qualidade do sono e satisfa??o profissional, comparando estas vari?veis quanto ?s caracter?sticas de trabalho, estrutura familiar e g?nero. A coleta de dados foi realizada com a aplica??o de question?rios em duas etapas: 1) sa?de e o sono (caracteriza??o geral dos h?bitos de sono); question?rio de Horne & Ostberg (caracteriza??o do cronotipo); Escala de Sonol?ncia de Epworth e o ?ndice de Qualidade do Sono de Pittsburg; 2) O di?rio de sono durante 14 dias. A partir dos resultados, observamos que os professores levantaram e deitaram mais cedo e apresentaram uma redu??o do tempo na cama em torno de 42min na semana quando comparada ao fim de semana. Esta redu??o no tempo na cama na semana foi acompanhada por uma maior dura??o do cochilo no fim de semana. Al?m disso, os professores levantaram aos s?bados mais cedo que aos domingos, provavelmente devido aos afazeres dom?sticos e lazer. O conhecimento dos professores sobre o sono foi baixo com rela??o ?s diferen?as individuais e o efeito de bebidas alco?licas sobre o sono e alto em rela??o ?s consequ?ncias da priva??o do sono. As diferen?as encontradas nas compara??es quanto ?s caracter?sticas de trabalho, estrutura familiar e g?nero foram pontuais, exceto com rela??o ao hor?rio de trabalho. Os professores que iniciavam o trabalho pela manh? e finalizavam ? noite levantaram mais cedo, dormiram mais tarde e apresentaram menor tempo na cama, em rela??o aos que trabalhavam apenas em dois turnos. Al?m disso, entre os professores que iniciavam o trabalho pela manh? e que foram classificados como vespertinos houve uma maior irregularidade no hor?rio de levantar em rela??o aos matutinos e intermedi?rios. Metade dos professores apresentou sonol?ncia excessiva, que teve correla??o positiva com a insatisfa??o com o trabalho. Em geral, os professores apresentaram m?dias do IQSP equivalentes ? m? qualidade de sono, tendo as mulheres piores m?dias. A partir dos resultados, sugere-se que o CSV dos professores varia de acordo com o hor?rio de trabalho, acarretando em irregularidade no CSV e priva??o de sono durante a semana, embora o efeito sobre irregularidade varie em fun??o do cronotipo. Estas altera??es s?o acompanhadas de sonol?ncia excessiva diurna e m? qualidade de sono. Por?m, faz-se necess?rio ampliar a amostra para esclarecer a influ?ncia das vari?veis relacionadas ao trabalho, ? estrutura familiar e g?nero em conjunto

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

Made available in DSpace on 2015-02-24T20:13:54Z (GMT). No. of bitstreams: 1 JoaoMGR_DISSERT.pdf: 11548329 bytes, checksum: b018f7ac6bfdefc0440cb7355ab6ae06 (MD5) Previous issue date: 2011-12-08 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / The circadian behavior associated with the 24 hours light-dark (LD) cycle (T24) is due to a circadian clock , which in mammals is located in the hypothalamic suprachiasmatic nucleus (SCN). Under experimental conditions in which rats are espoused to a symmetric LD 22h cycle (T22) the two SCN regions, ventrolateral (vl) and dorsomedial (dm), can be functionally isolated, suggesting that each region regulates distinct physiological and behavioral components. The vl region regulates the locomotor activity and slow wave sleep (SWS) rhythms, while the dm region assures the body temperature and paradoxical sleep (PS) rhythms regulation. This research aimed to deepen the knowledge on the functional properties of circadian rhythmicity, specifically about the internal desynchronization process, and its consequences to locomotor activity and body temperature rhythms as well as to the sleep-wake cycle pattern in rats. We applied infrared motion sensors, implanted body temperature sensors and a telemetry system to record electrocorticogram (ECoG) and electromyogram (EMG) in two rat groups. The control group under 24h period LD cycle (T24: 12hL-12hD) to the baseline record and the experimental group under 22h period LD cycle (T22: 11hL- 11hD), in which is known to occur the uncoupling process of the circadian locomotor activity rhythm where the animals show two distinct locomotor activity rhythms: one synchronized to the external LD cycle, and another expressed in free running course, with period greater than 24h. As a result of 22h cycles, characteristic locomotor activity moment appear, that are coincidence moments (T22C) and non coincidence moments (T22NC) which were the main focus or our study. Our results show an increase in locomotor activity, especially in coincidence moments, and the inversion of locomotor activity, body temperature, and sleep-wake cycle patterns in non coincidence moments. We can also observe the increase in SWS and decrease in PS, both in coincidence and non coincidence moments. Probably the increases in locomotor activity as a way to promote the coupling between circadian oscillators generate an increased homeostatic pressure and thus increase SWS, promoting the decreasing in PS / O comportamento circadiano associado ao ciclo di?rio de 24 horas deve-se ? a??o de um rel?gio circadiano que em mam?feros se localiza nos n?cleos supraquiasm?ticos do hipot?lamo (NSQs). Sob condi??es experimentais em que ratos s?o submetidos a um ciclo claro-escuro (CE) sim?trico de 22h (T22) as regi?es ventrolateral (vl) e dorsomedial (dm) dos NSQs podem ser separadas funcionalmente, sugerindo que cada regi?o regula vari?veis fisiol?gicas distintas. A regi?o vl regula os ritmos de atividade e sono de ondas lentas (SOL), enquanto a regi?o dm ? respons?vel pelo ritmo da temperatura corporal e sono paradoxal (SP). A investiga??o desenvolvida no presente trabalho visou aprofundar o conhecimento sobre as propriedades funcionais da ritmicidade circadiana, mais especificamente sobre o processo da dessincroniza??o interna e as suas implica??es no ritmo de atividade locomotora, temperatura corporal e padr?o do ciclo sono-vig?lia em ratos. Com este objetivo, foram utilizados sensores de movimentos por infravermelho e implantados sensores para temperatura corporal, al?m disso o sistema de telemetria foi utilizado para o registro de par?metros fisiol?gicos de eletrocorticograma (ECoG) e eletromiograma (EMG), em dois grupos de animais. O grupo controle sob ciclo claro-escuro com per?odo de T24 (12h claro: 12h escuro), para o registro basal das vari?veis em an?lise; e o grupo experimental sob ciclo claro-escuro com per?odo de T22 (11h claro: 11h escuro), no qual se sabe que ocorre o desacoplamento do ritmo circadiano de atividade locomotora e os animais apresentam dois componentes distintos de atividade: um sincronizado ao ciclo claro-escuro; e outro que se expressa em livre curso, com per?odo maior que 24h. Em decorr?ncia do protocolo de dessincroniza??o for?ada, surgem momentos caracter?sticos no perfil de atividade locomotora: momentos de coincid?ncia (T22C) e de n?o coincid?ncia (T22NC), que foram o foco principal do nosso estudo. Podemos observar o aumento de atividade locomotora principalmente em momentos de coincid?ncia, e a invers?o do padr?o de atividade locomotora, temperatura corporal e ciclo sono-vig?lia em momentos de n?o coincid?ncia. Podemos ainda observar o aumento do SOL e diminui??o do SP, tanto em momentos de coincid?ncia como em momentos de n?o coincid?ncia. ? prov?vel que o aumento da atividade locomotora como forma de facilitar o acoplamento entre os osciladores circadianos gere um aumento da press?o homeost?tica e com isso aumento de SOL, e diminui a dura??o de SP

Made available in DSpace on 2014-12-17T15:36:53Z (GMT). No. of bitstreams: 1 AnaPLM.pdf: 607381 bytes, checksum: 38ed8ff61bb80d4aa7e083e73b98e3f8 (MD5) Previous issue date: 2008-06-04 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The sleep onset and offset delay at adolescence in relation to childhood. Besides biological causes, some external factors as academic obligations and socialization contributes, increasing the burden of school and socialization. However, morning school schedules reduce sleep duration. Besides light strong effect, studies in humans have indicated that exercise influence circadian synchronization. To evaluate the effect of the morning exercise under sunlight on sleep-wake cycle (SWC) of adolescents, 160 high school students (11th year) were exposed to the following conditions: lesson in usual classroom (Group C), lesson in swimming pool exposed to sunlight (Group E), half of them carrying through physical activity (EE) and the other resting (EL). Each experimental group met two stages: assessment of SWC 1 week before and 1 week during the intervention, which was held in Monday and Wednesday between 7:45 and 8:30 am. In the baseline, there were applied the questionnaires "Health and Sleep" and cronotype evaluation (H & O). In addition, students were evaluated before and during the intervention by "Sleep Diary", "Karolinska Sleepiness Scale" (KSS), Psychomotor Vigilance Test (PVT) and actimetry. During the intervention, there was a delay in wake-up time on the weekend and a trend to greater sleep duration on week for the three groups. At the weekend, only the groups EE and EL increased sleep duration. There was no difference in bedtime, irregularity of sleep schedules and nap variables. The sleepiness showed a circadian pattern characterized by higher alertness levels at 11:30 am and sleepiness levels at bedtime and wake-up time on week. On weekends there were higher levels of alertness in these times. In the days of intervention, there was an increase of sleepiness at 11:30 am for groups EL and EE, which may have been caused by a relaxing effect of contact with the water of the pool. In addition, the group EE showed higher alert levels at 14:30 pm on Monday and at 8:30 am in the Wednesday, possibly caused by exercise arousal effect. The reaction time assessed through the TPV did not vary between the stages. The sleep quality improved in the three groups in the second stage, making impossible the evaluation of intervention effect. However, the sleep quality increased on Monday and Tuesday only on the group EE. From the results, it is suggested that the intervention promoted effects on the sleepiness at some day hours. In other SWC variables there were no effects, possibly due to a large SWC irregularity on weekends. Thus, the evaluation of higher weekly frequency EF is necessary, since only two days were insufficient to promote greater effect on adolescents SWC / Na adolesc?ncia h? uma tend?ncia a dormir e acordar mais tarde em rela??o ? inf?ncia. Embora esta caracter?stica tenha causas biol?gicas, alguns fatores externos podem favorec?-la: como o aumento da carga escolar e da socializa??o. No sentido contr?rio os hor?rios escolares matutinos representam um dos grandes fatores respons?veis pela priva??o parcial de sono. Ainda que a exposi??o ? luz seja considerada o regulador mais importante do sistema circadiano em mam?feros, estudos em seres humanos indicaram que o exerc?cio f?sico influencia a sincroniza??o circadiana. Por isso, o objetivo do nosso trabalho ? avaliar o efeito do exerc?cio f?sico matinal sob luz solar no ciclo vig?lia-sono (CVS) de adolescentes. O estudo contou com a participa??o de 160 alunos do ensino m?dio (1? e 2? ano), expostos ?s seguintes condi??es: aula na sala habitual (Grupo C), aula na piscina exposto ? luz solar (Grupo E), metade em exerc?cio f?sico (EE) e outra em repouso (EL). Cada grupo experimental cumpriu duas etapas: avalia??o do CVS 1 semana antes e 1 semana durante a interven??o, que foi realizada na 2? e 4? feira entre 7:45 e 8:30 h. Na linha de base foram aplicados os question?rios Sa?de e Sono e de avalia??o do cronotipo (H&O). Al?m disso, os alunos foram avaliados antes e durante a interven??o pelo Di?rio de sono , Escala de Sonol?ncia de Karolinska (ESK), Teste de vigil?ncia psicomotora (TPV) e actimetria. Durante a interven??o, houve atraso no hor?rio de acordar no fim de semana e tend?ncia a maior dura??o do sono na semana nos tr?s grupos. No fim de semana, apenas os grupos EE e EL passaram a dormir mais. N?o houve diferen?a no hor?rio de dormir, na irregularidade dos hor?rios de sono e nas vari?veis do cochilo. A sonol?ncia apresentou um padr?o circadiano caracterizado por maior alerta ?s 11:30 h e maior sonol?ncia nos hor?rios de acordar e dormir na semana, e menor sonol?ncia nos finais de semana. Nos dias de interven??o, houve um aumento da sonol?ncia ?s 11:30 h para os grupos EE e EL, que pode ter sido decorrente de um efeito relaxante do contato com a ?gua da piscina. Al?m disso, o grupo EE apresentou maiores n?veis de alerta ?s 14:30 h na 2? feira e ?s 8:30 h na 4? feira, possivelmente decorrentes de um efeito ativacional do exerc?cio. O tempo de rea??o avaliado por meio do TPV n?o variou entre as etapas. A qualidade do sono melhorou nos tr?s grupos na 2? etapa, impossibilitando avaliar o efeito da interven??o. Entretanto, houve melhora na qualidade do sono na 2? e 3? feira apenas para o grupo EE. A partir dos resultados, sugere-se que a interven??o promoveu efeitos sobre a sonol?ncia em alguns hor?rios. Nas outras vari?veis n?o foram observados efeitos, possivelmente devido a uma grande irregularidade no CVS nos finais de semana. Faz- se necess?rio ampliar o estudo com a realiza??o de exerc?cio f?sico numa freq??ncia semanal maior, visto que apenas dois dias foram insuficientes para promover maiores efeitos no CVS dos adolescentes

The Resilient Educators support programme (REds) for HIV and AIDS affected educators was initiated by the University of the Northwest in 2006, following a research project in 2005 that highlighted the need for a support programme that addresses the challenges of educators affected by HIV and AIDS, as existing support structures were found to be inadequate. The REds programme is implemented in phases, and after the completion of each phase, the programme is modified to meet the needs of a broader audience of educators. Since 2006, the REds programme has been implemented by independent researchers in four South African provinces, Gauteng, Mpumalanga, the Northwest province and the Free State. This round of implementation included a comparison group, to allow researchers to compare data. The 2009 implementation of the REds programme was aimed at gathering comparative data to prove that the programme has a positive impact on the quality of life and resilience of educators. This was done in order to provide to the greater REds programme the opportunity to generalise the findings of the programme, and implement it on a national level. The goal of this study was to evaluate the effectiveness of the 2009 version of the REds programme to enhance the quality of life and resilience of HIV and AIDS affected educators in Gauteng. For the purpose of this research study, the researcher used applied and evaluative research. The mixed methods research approach was used, followed by the concurrent triangulation design. The qualitative and quantitative data carried the same weight in the results of the study, and the data sets were merged in the interpretation to produce well-validated conclusions. When comparing the pre- and post-test results, both the quantitative and qualitative data were used to prove or disprove the hypothesis. For the quantitative part of the study, the researcher made use of a quasi-experimental design namely the comparison group pre-test-post-test design. For the qualitative part of the study, the researcher used a collective case study design. Quantitative data was collected through two group administered standardised questionnaires, the Professional Quality of Life Screening (ProQol) and the Resilience Scale for Adults (RSA). Qualitative data was collected by using a narrative, drawings and observations. Pre-test data was collected from the experimental and comparison groups prior to exposure to the REds programme. The experimental group participated in the programme and afterwards, both the experimental and comparison groups participated in a post-test. The participants were recruited from the Diepsloot Combined School and the Emfundiswene Primary School in Alexandra, Johannesburg, Gauteng, by using non-probability volunteer sampling. The quantitative empirical research findings in the experimental group data showed minimal differences between the pre- and post-test data for the ProQol test, and trivial differences in the RSA screening. The comparison group data also showed minimal differences, but the differences were in a downward trend. When comparing the experimental and comparison group findings, the experimental group’s results were slightly more positive than the comparison group, but not enough to draw valid conclusions. However, the qualitative findings showed that the participants in the experimental group found that the programme addressed their support needs as HIV and AIDS affected educators and they felt empowered with knowledge and skills that they lacked, thus making them more resilient. The researcher did not mark any changes in the comparison group data, thus indicating that they did not feel empowered. The researcher hypothesised the following: If the Resilient Educators support programme (REds) were implemented among HIV and AIDS affected educators, their quality of life and resilience will be increased. Conclusions drawn from the qualitative research findings indicated that the REds programme met the support needs of HIV and AIDS affected educators, as the experimental group indicated that they felt empowered and the comparison group did not indicate this. The quantitative data results were not significant enough to prove or disprove the proposed hypothesis, and thus the researcher recommends that the reasons for the insignificant test results from the questionnaires be investigated. AFRIKAANS : Die Resilient Educators Support Programme (REds), ’n ondersteunings program vir MIV-en VIGS-geaffekteerde opvoeders, is in 2006, deur die Noordwes-Universiteit ontwikkel. Die projek spruit uit navorsing wat in 2005 gedoen is en getoon het dat die uitdagings wat MIV-en VIGS-geaffekteerde opvoeders in die gesig staar nie aangespreek word deur die huidige ondersteuningstrukture nie, en dat daar ’n daadwerklike behoefte aan ’n ondersteuningsprogram bestaan. Die REds-program word in fases geïmplementeer, en in elke fase, word die program heraangepas om aan die behoeftes van ’n breër teikengehoor van opvoeders te voldoen. Sedert die begin van die projek in 2006, is die REds-program deur verskeie onafhanklike navorsers, in vier Suid Afrikaanse provinsies, Gauteng, Mpumalanga, Noordwes en die Vrystaat geïmplementeer. Die 2009-implementering van die REds-program, het ’n vergelykende groep ingesluit, wat navorsers instaat stel om die data wat ingesamel word te vergelyk met ’n groep wat nie ’n intervensie ontvang het nie. Die 2009-implementering van die REds-program se doel was om vergelykbare data in te samel, en sodoende te bewys dat die program ‘n positiewe impak op die lewensgehalte en veerkragtigheid van opvoeders het. Die doel van hierdie studie was om te evalueer hoe doeltreffend die 2009-weergawe van die REds-program die lewenskwaliteit en veerkragtigheid van MIV-en VIGS geaffekteerde opvoeders in Gauteng verbeter. Vir die doeleindes van hierdie navorsing het die navorser toegepaste en evaluerende navorsing benut. Die gemengdemetode-navorsingsbenadering en die samewerkende triangulasie-ontwerp is benut. Die kwantitatiewe en kwalitatiewe data dra ewe veel gewig in die resultate van die studie. Datastelle is ook saamgevoeg tydens die interpretasie daarvan ten einde deeglik gestaafde gevolgtrekkings te maak. Tydens die vergelyking van die voor- en na-toetsresultate, is die kwantitatiewe en kwalitatiewe data benut om die hipotese te bewys of te weerlê. Vir die kwantitatiewe deel van die studie het die navorser ‘n kwasieksperimentele ontwerp, genaamd die groep-vergelykende voor-toets-na-toetsontwerp benut. Die kwalitatiewe deel van die studie is gedoen met behulp van die kollektiewe gevallestudie-ontwerp. Kwantitatiewe data is verkry deur twee groepgeadministreerde gestandaardiseerde vraelyste, die Professional Quality of Life Screening (ProQol) en die Resilience Scale for Adults (RSA), te gebruik. Kwalitatiewe data is ingesamel deur gebruik te maak van ’n narratief, tekeninge en observasies. Voor-toets-data is ingesamel by die eksperimentele en vergelykende groep. Die eksperimentele groep het die die REdsprogram deurloop en beide groepe het daarna deelgeneem aan die na-toets. Die deelnemers van die Diepsloot gekombineerde skool en die Emfundiswene laerskool in Alexandra, Johannesburg is by wyse van ’n nie-waarskynlikheids steekproeftrekking gekies, deur van die vrywillige steekproeftegniek gebruik te maak. Die kwantitatiewe navorsingsbevindinge van die eksperimentele groep het minimale verskille tussen die voor- en na-toets-data getoon vir die ProQol-toets, en niksbeduidende verskille is opgemerk in die RSA-toets. Die vergelykende groep se data het ook minimale verskille tussen die voor- en na-toets getoon, maar hierdie veranderings was negatief. In ’n vergelyking tussen die eksperimentele en vergelykende groep se resultate, is bevind dat die eksperimentele groep se uitslae meer positief van aard was as die van die vergelykende groep. Hierdie verskil is egter so klein dat geen werklilke gevolgtrekkings gemaak kan word nie. Desnieteenstaande het die kwalitatiewe bevindinge getoon dat die program wel aan die eksperimentele groep se ondersteuningsbehoeftes voorsien het. Die deelnemers het aangedui dat hulle bemagtig is met die kennis en vaardighede wat hul benodig om hul veerkragtigheid te verhoog. Die navorser het egter geen veranderinge in die vergelykende groep se data waargeneem nie, wat dus beteken dat die vergelykende groep nie bemagtig is nie. Die navorser het die volgende hipotese geformuleer: Indien die Resilient Educators support program (REds) onder MIV-en VIGS-geaffekteerde opvoeders geïmplimenteer word, sal hul lewenskwaliteit en veerkragtigheid verbeter. Gevolgtrekkings gemaak na gelang van die kwalitatitewe navorsingsbevindinge toon aan dat die REds-program wel die ondersteuningsbehoeftes van die opvoeders aanspreek, aangesien die eksperimentele groep aangedui het dat hulle bemagtig voel, in teenstelling met die vergelykende groep wat nie bemagtig voel nie. Die kwantitatiewe navorsingsbevindinge was egter van so ’n aard dat die navorser dit nie kon benut om die hipotese waar of vals te bewys nie. Na gelang van hierdie bevinding beveel die navorser onder andere aan dat die rede(s) vir die niksseggende kwantitatiewe toetsresultate verder ondersoek word. / Dissertation (MSW)--University of Pretoria, 2010. / Social Work and Criminology / unrestricted