Effect of morning exercise in sunlight on the sleep-wake cycle in adolescents

A delay in bedtime occurs in adolescence compared with childhood. However, the early waking that morning school hours impose leads to partial sleep deprivation. Although exposure to light is the most important regulator of circadian rhythm in mammals, physical exercise influences circadian synchroni...

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Principais autores:	Maia, Ana Paula Leão, Sousa, Ivanise Cortez de, Azevedo, Carolina Virginia Macêdo de
Formato:	article
Idioma:	eng
Publicado em:	Instituto Brasileiro de Neuropsicologia e Comportamento (IBNeC)
Assuntos:	Adolescents Physical exercise Sleep-wake cycle School time
Endereço do item:	https://repositorio.ufrn.br/jspui/handle/123456789/24697
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id	ri-123456789-24697
record_format	dspace
spelling	ri-123456789-246972021-11-09T17:50:13Z Effect of morning exercise in sunlight on the sleep-wake cycle in adolescents Maia, Ana Paula Leão Sousa, Ivanise Cortez de Azevedo, Carolina Virginia Macêdo de Adolescents Physical exercise Sleep-wake cycle School time A delay in bedtime occurs in adolescence compared with childhood. However, the early waking that morning school hours impose leads to partial sleep deprivation. Although exposure to light is the most important regulator of circadian rhythm in mammals, physical exercise influences circadian synchronization. To assess the effect of morning physical exercise in sunlight on the sleep-wake cycle (SWC) in adolescents, 160 first- and second-year high-school students were exposed to classes in their usual classroom (Group C) or in a swimming pool exposed to sunlight (Group E) while physically exercising (EE; i.e., swimming) or resting (EL). At baseline, we applied Health and Sleep and Horne & Ostberg chronotype assessment questionnaires. One week later and during the intervention, we applied the Sleep Diary and Karolinska Sleepiness Scale. During the intervention we observed no changes in bedtime, time in bed and in indices of irregularity of bedtime and wake-up time. The changes observed in wake-up time (i.e., a delay in the EE group on Saturday), sleep quality (i.e., an improvement), and sleepiness (i.e., an increase) were also observed in the control group, discarding an intervention effect. We suggest that morning physical exercise in sunlight had no effect on SWC parameters, sleep quality, or daytime sleepiness, possibly because of the large irregularity in the SWC between weekdays and weekends in adolescent students as well as the low frequency and duration of exercise during the intervention. Therefore, studies that evaluate a higher frequency or duration of exercise are needed to assess its effect on the SWC in adolescents 2018-02-01T13:38:22Z 2018-02-01T13:38:22Z 2011 article MAIA, Ana Paula Leão; SOUSA, Ivanise Cortez de; AZEVEDO, Carolina Virginia Macêdo de. Effect of morning exercise in sunlight on the sleep-wake cycle in adolescents. Psychology and Neuroscience, v. 4, p. 323-331, 2011. Disponível em: <http://doi.apa.org/fulltext/2015-08700-005.html>. Acesso em: 20 nov. 2017. 1983-3288 10.3922/j.psns.2011.3.005 https://repositorio.ufrn.br/jspui/handle/123456789/24697 eng Acesso Aberto application/pdf Instituto Brasileiro de Neuropsicologia e Comportamento (IBNeC)
institution	Repositório Institucional
collection	RI - UFRN
language	eng
topic	Adolescents Physical exercise Sleep-wake cycle School time
spellingShingle	Adolescents Physical exercise Sleep-wake cycle School time Maia, Ana Paula Leão Sousa, Ivanise Cortez de Azevedo, Carolina Virginia Macêdo de Effect of morning exercise in sunlight on the sleep-wake cycle in adolescents
description	A delay in bedtime occurs in adolescence compared with childhood. However, the early waking that morning school hours impose leads to partial sleep deprivation. Although exposure to light is the most important regulator of circadian rhythm in mammals, physical exercise influences circadian synchronization. To assess the effect of morning physical exercise in sunlight on the sleep-wake cycle (SWC) in adolescents, 160 first- and second-year high-school students were exposed to classes in their usual classroom (Group C) or in a swimming pool exposed to sunlight (Group E) while physically exercising (EE; i.e., swimming) or resting (EL). At baseline, we applied Health and Sleep and Horne & Ostberg chronotype assessment questionnaires. One week later and during the intervention, we applied the Sleep Diary and Karolinska Sleepiness Scale. During the intervention we observed no changes in bedtime, time in bed and in indices of irregularity of bedtime and wake-up time. The changes observed in wake-up time (i.e., a delay in the EE group on Saturday), sleep quality (i.e., an improvement), and sleepiness (i.e., an increase) were also observed in the control group, discarding an intervention effect. We suggest that morning physical exercise in sunlight had no effect on SWC parameters, sleep quality, or daytime sleepiness, possibly because of the large irregularity in the SWC between weekdays and weekends in adolescent students as well as the low frequency and duration of exercise during the intervention. Therefore, studies that evaluate a higher frequency or duration of exercise are needed to assess its effect on the SWC in adolescents
format	article
author	Maia, Ana Paula Leão Sousa, Ivanise Cortez de Azevedo, Carolina Virginia Macêdo de
author_facet	Maia, Ana Paula Leão Sousa, Ivanise Cortez de Azevedo, Carolina Virginia Macêdo de
author_sort	Maia, Ana Paula Leão
title	Effect of morning exercise in sunlight on the sleep-wake cycle in adolescents
title_short	Effect of morning exercise in sunlight on the sleep-wake cycle in adolescents
title_full	Effect of morning exercise in sunlight on the sleep-wake cycle in adolescents
title_fullStr	Effect of morning exercise in sunlight on the sleep-wake cycle in adolescents
title_full_unstemmed	Effect of morning exercise in sunlight on the sleep-wake cycle in adolescents
title_sort	effect of morning exercise in sunlight on the sleep-wake cycle in adolescents
publisher	Instituto Brasileiro de Neuropsicologia e Comportamento (IBNeC)
publishDate	2018
url	https://repositorio.ufrn.br/jspui/handle/123456789/24697
work_keys_str_mv	AT maiaanapaulaleao effectofmorningexerciseinsunlightonthesleepwakecycleinadolescents AT sousaivanisecortezde effectofmorningexerciseinsunlightonthesleepwakecycleinadolescents AT azevedocarolinavirginiamacedode effectofmorningexerciseinsunlightonthesleepwakecycleinadolescents
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Effect of morning exercise in sunlight on the sleep-wake cycle in adolescents

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