Cognitive Performance During Night Work in the Cold

Objective: The objective of this study was to investigate how night work at low ambient temperatures affects cognitive performance (short-term memory and reaction time), skin- and core temperature, thermal comfort, sleepiness, and cortisol. We hypothesized that cognitive performance is reduced at ni...

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Autores principales:	Hilde Færevik, Jakob Hønborg Hansen, Øystein Wiggen, Mariann Sandsund
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	day/night work cold environment cognitive performance temperature regulation sleepiness cortisol Physiology QP1-981
Acceso en línea:	https://doaj.org/article/0ec6aeadab764d0c8fd06fe889533681
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spelling	oai:doaj.org-article:0ec6aeadab764d0c8fd06fe8895336812021-12-03T06:42:58ZCognitive Performance During Night Work in the Cold1664-042X10.3389/fphys.2021.768517https://doaj.org/article/0ec6aeadab764d0c8fd06fe8895336812021-12-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fphys.2021.768517/fullhttps://doaj.org/toc/1664-042XObjective: The objective of this study was to investigate how night work at low ambient temperatures affects cognitive performance (short-term memory and reaction time), skin- and core temperature, thermal comfort, sleepiness, and cortisol. We hypothesized that cognitive performance is reduced at night compared with daytime and worsened when exposed to low ambient temperatures.Method: Eleven male subjects were recruited to perform three tests in a climatic chamber at night and daytime: Night –2°C, Night 23°C and Day 23°C. Each test lasted 6 h. Cognitive performance (short-term memory and reaction time), skin- and core temperature, thermal sensation and comfort, cortisol levels and sleepiness were measured during the tests.Results: A lower mean skin temperature and corresponding lower thermal sensation were observed at Night –2°C compared to Day 23°C and Night 23°C. Night work caused increased sleepiness and lower cortisol levels, but was not affected by changes in ambient temperatures, thermal comfort, or skin temperatures. There was no effect of either day/night work nor ambient temperature on the short-term memory or reaction time test.Conclusion: Lower skin- and core temperature were observed at night when exposed to low ambient temperature (–2°C), but there was no effect on short-term memory or reaction time. Increased sleepiness and lower cortisol levels were observed at night compared to daytime and was not influenced by low ambient temperature at night. The result from this study suggests that cognitive performance (short-term memory and reaction time) is not adversely affected by night work when exposed to low ambient temperatures if adequate protective clothing is worn.Hilde FærevikJakob Hønborg HansenØystein WiggenMariann SandsundFrontiers Media S.A.articleday/night workcold environmentcognitive performancetemperature regulationsleepinesscortisolPhysiologyQP1-981ENFrontiers in Physiology, Vol 12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	day/night work cold environment cognitive performance temperature regulation sleepiness cortisol Physiology QP1-981
spellingShingle	day/night work cold environment cognitive performance temperature regulation sleepiness cortisol Physiology QP1-981 Hilde Færevik Jakob Hønborg Hansen Øystein Wiggen Mariann Sandsund Cognitive Performance During Night Work in the Cold
description	Objective: The objective of this study was to investigate how night work at low ambient temperatures affects cognitive performance (short-term memory and reaction time), skin- and core temperature, thermal comfort, sleepiness, and cortisol. We hypothesized that cognitive performance is reduced at night compared with daytime and worsened when exposed to low ambient temperatures.Method: Eleven male subjects were recruited to perform three tests in a climatic chamber at night and daytime: Night –2°C, Night 23°C and Day 23°C. Each test lasted 6 h. Cognitive performance (short-term memory and reaction time), skin- and core temperature, thermal sensation and comfort, cortisol levels and sleepiness were measured during the tests.Results: A lower mean skin temperature and corresponding lower thermal sensation were observed at Night –2°C compared to Day 23°C and Night 23°C. Night work caused increased sleepiness and lower cortisol levels, but was not affected by changes in ambient temperatures, thermal comfort, or skin temperatures. There was no effect of either day/night work nor ambient temperature on the short-term memory or reaction time test.Conclusion: Lower skin- and core temperature were observed at night when exposed to low ambient temperature (–2°C), but there was no effect on short-term memory or reaction time. Increased sleepiness and lower cortisol levels were observed at night compared to daytime and was not influenced by low ambient temperature at night. The result from this study suggests that cognitive performance (short-term memory and reaction time) is not adversely affected by night work when exposed to low ambient temperatures if adequate protective clothing is worn.
format	article
author	Hilde Færevik Jakob Hønborg Hansen Øystein Wiggen Mariann Sandsund
author_facet	Hilde Færevik Jakob Hønborg Hansen Øystein Wiggen Mariann Sandsund
author_sort	Hilde Færevik
title	Cognitive Performance During Night Work in the Cold
title_short	Cognitive Performance During Night Work in the Cold
title_full	Cognitive Performance During Night Work in the Cold
title_fullStr	Cognitive Performance During Night Work in the Cold
title_full_unstemmed	Cognitive Performance During Night Work in the Cold
title_sort	cognitive performance during night work in the cold
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/0ec6aeadab764d0c8fd06fe889533681
work_keys_str_mv	AT hildefærevik cognitiveperformanceduringnightworkinthecold AT jakobhønborghansen cognitiveperformanceduringnightworkinthecold AT øysteinwiggen cognitiveperformanceduringnightworkinthecold AT mariannsandsund cognitiveperformanceduringnightworkinthecold
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Cognitive Performance During Night Work in the Cold

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