0243 SLEEP REGULARITY AND MENTAL HEALTH DURING EXTENDED ANTARCTIC RESIDENCE
Abstract Introduction As humans’ advance towards a Mars mission, ensuring astronaut safety, well-being, and performance becomes increasingly critical. Long-duration space exploration presents several challenges for human sleep, including altered photoperiods, prolonged confinement, and monotony. Ant...
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croxfordunivpr:10.1093/sleep/zsad077.0243 2023-06-18T03:38:14+02:00 0243 SLEEP REGULARITY AND MENTAL HEALTH DURING EXTENDED ANTARCTIC RESIDENCE Cifre, Anthony Mi, Qi Ahamed, Nizam Bower, Joanne Connaboy, Christopher Simpson, Richard Alfano, Candice 2023 http://dx.doi.org/10.1093/sleep/zsad077.0243 https://academic.oup.com/sleep/article-pdf/46/Supplement_1/A108/50467283/zsad077.0243.pdf en eng Oxford University Press (OUP) https://academic.oup.com/pages/standard-publication-reuse-rights SLEEP volume 46, issue Supplement_1, page A108-A108 ISSN 0161-8105 1550-9109 Physiology (medical) Neurology (clinical) journal-article 2023 croxfordunivpr https://doi.org/10.1093/sleep/zsad077.0243 2023-06-02T09:26:39Z Abstract Introduction As humans’ advance towards a Mars mission, ensuring astronaut safety, well-being, and performance becomes increasingly critical. Long-duration space exploration presents several challenges for human sleep, including altered photoperiods, prolonged confinement, and monotony. Antarctica provides an ideal analog for understanding how these and other stressors impact sleep over time. Prior studies among Antarctic cohorts have found reduced total sleep, increased sleep onset, and circadian phase delay. However, day-to-day regularity of sleep-wake patterns in the Antarctic over prolonged periods has not been studied. Methods Crew members (N= 110) at a coastal (McMurdo: MM, n = 88) and an inland Antarctic station (South Pole: SP, n = 22) were studied longitudinally for up to 9-months. Sleep was monitored continuously with actigraphy (Actiwatch Spectrum, Philips Respironics) and examined in relation to cumulative time on station and calendar month (photoperiod). Self-reported mental health symptoms were also examined monthly using The Mental Health Checklist (MHCL). The Sleep Regularity Index (SRI; Phillips et al., 2017) which calculates the percentage probability of an individual being in the same state (sleep vs. wake) at any two time-points 24 hours apart was calculated to examine sleep regularity over time. Results Controlling for time on station prior to participation, we observed no significant changes in monthly SRI over a 6-month period at MM where photoperiod alterations are less extreme. At SP, SRI remained very stable during months of total daylight but declined during winter months in the absence of sunlight. SRI scores were significantly different between month-8 and month-9 and with large effect sizes across month-7, month-8, and month-9. Participants with lower month-7 SRI scores had significantly higher MHCL poor self-regulation scores at the end of the mission. Conclusion Day-to-day variability in sleep–wake patterns is an important predictor of health and safety. Our findings show ... Article in Journal/Newspaper Antarc* Antarctic Antarctica South pole South pole Oxford University Press (via Crossref) Antarctic South Pole The Antarctic SLEEP 46 Supplement_1 A108 A108 |
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Physiology (medical) Neurology (clinical) |
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Physiology (medical) Neurology (clinical) Cifre, Anthony Mi, Qi Ahamed, Nizam Bower, Joanne Connaboy, Christopher Simpson, Richard Alfano, Candice 0243 SLEEP REGULARITY AND MENTAL HEALTH DURING EXTENDED ANTARCTIC RESIDENCE |
topic_facet |
Physiology (medical) Neurology (clinical) |
description |
Abstract Introduction As humans’ advance towards a Mars mission, ensuring astronaut safety, well-being, and performance becomes increasingly critical. Long-duration space exploration presents several challenges for human sleep, including altered photoperiods, prolonged confinement, and monotony. Antarctica provides an ideal analog for understanding how these and other stressors impact sleep over time. Prior studies among Antarctic cohorts have found reduced total sleep, increased sleep onset, and circadian phase delay. However, day-to-day regularity of sleep-wake patterns in the Antarctic over prolonged periods has not been studied. Methods Crew members (N= 110) at a coastal (McMurdo: MM, n = 88) and an inland Antarctic station (South Pole: SP, n = 22) were studied longitudinally for up to 9-months. Sleep was monitored continuously with actigraphy (Actiwatch Spectrum, Philips Respironics) and examined in relation to cumulative time on station and calendar month (photoperiod). Self-reported mental health symptoms were also examined monthly using The Mental Health Checklist (MHCL). The Sleep Regularity Index (SRI; Phillips et al., 2017) which calculates the percentage probability of an individual being in the same state (sleep vs. wake) at any two time-points 24 hours apart was calculated to examine sleep regularity over time. Results Controlling for time on station prior to participation, we observed no significant changes in monthly SRI over a 6-month period at MM where photoperiod alterations are less extreme. At SP, SRI remained very stable during months of total daylight but declined during winter months in the absence of sunlight. SRI scores were significantly different between month-8 and month-9 and with large effect sizes across month-7, month-8, and month-9. Participants with lower month-7 SRI scores had significantly higher MHCL poor self-regulation scores at the end of the mission. Conclusion Day-to-day variability in sleep–wake patterns is an important predictor of health and safety. Our findings show ... |
format |
Article in Journal/Newspaper |
author |
Cifre, Anthony Mi, Qi Ahamed, Nizam Bower, Joanne Connaboy, Christopher Simpson, Richard Alfano, Candice |
author_facet |
Cifre, Anthony Mi, Qi Ahamed, Nizam Bower, Joanne Connaboy, Christopher Simpson, Richard Alfano, Candice |
author_sort |
Cifre, Anthony |
title |
0243 SLEEP REGULARITY AND MENTAL HEALTH DURING EXTENDED ANTARCTIC RESIDENCE |
title_short |
0243 SLEEP REGULARITY AND MENTAL HEALTH DURING EXTENDED ANTARCTIC RESIDENCE |
title_full |
0243 SLEEP REGULARITY AND MENTAL HEALTH DURING EXTENDED ANTARCTIC RESIDENCE |
title_fullStr |
0243 SLEEP REGULARITY AND MENTAL HEALTH DURING EXTENDED ANTARCTIC RESIDENCE |
title_full_unstemmed |
0243 SLEEP REGULARITY AND MENTAL HEALTH DURING EXTENDED ANTARCTIC RESIDENCE |
title_sort |
0243 sleep regularity and mental health during extended antarctic residence |
publisher |
Oxford University Press (OUP) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1093/sleep/zsad077.0243 https://academic.oup.com/sleep/article-pdf/46/Supplement_1/A108/50467283/zsad077.0243.pdf |
geographic |
Antarctic South Pole The Antarctic |
geographic_facet |
Antarctic South Pole The Antarctic |
genre |
Antarc* Antarctic Antarctica South pole South pole |
genre_facet |
Antarc* Antarctic Antarctica South pole South pole |
op_source |
SLEEP volume 46, issue Supplement_1, page A108-A108 ISSN 0161-8105 1550-9109 |
op_rights |
https://academic.oup.com/pages/standard-publication-reuse-rights |
op_doi |
https://doi.org/10.1093/sleep/zsad077.0243 |
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SLEEP |
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46 |
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A108 |
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A108 |
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