Cognitive performance and self-reported sleepiness are modulated by time-of-day during a mountain ultramarathon

Ninety-two runners completed the study during a 168 km mountain ultramarathon (MUM). Sleepiness, self-reported sleep duration, and cognitive performance were assessed the day before the race and up to eight checkpoints during the race. Sleepiness was assessed using the Karolinska Sleepiness Scale. C...

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Bibliographic Details
Published in:Research in sports medicine 2018-10, Vol.26 (4), p.482-489
Main Authors: Hurdiel, Rémy, Riedy, Samantha M., Millet, Gregoire P., Mauvieux, Benoit, Pezé, Thierry, Elsworth-Edelsten, Charlotte, Martin, Dudoignon, Zunquin, Gauntier, Dupont, Grégory
Format: Article
Language:English
Subjects:
Cognition
cognitive performances
Cognitive science
endurance
Female
Humanities and Social Sciences
Humans
Life Sciences
Male
Middle Aged
Neuroscience
Psychology
Psychomotor Performance
Running
Self Report
self-reported sleepiness
Sleep
Sleep deprivation
Time Factors
Ultramarathon
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Summary:Ninety-two runners completed the study during a 168 km mountain ultramarathon (MUM). Sleepiness, self-reported sleep duration, and cognitive performance were assessed the day before the race and up to eight checkpoints during the race. Sleepiness was assessed using the Karolinska Sleepiness Scale. Cognitive performance was also assessed using the Digital Symbol Substitution Task (DSST). Runner reported 23.40 ± 22.20 minutes of sleep (mean ± SD) during the race (race time: 29.38 to 46.20 hours). Sleepiness and cognitive performance decrements increased across this race, and this was modulated by time-of-day with higher sleepiness and greater performance decrements occurring during the early morning hours. Runners who slept on the course prior to testing had poorer cognitive performance, which may suggest that naps on the course were taken due to extreme exertion. This study provides evidence that cognitive performance deficits and sleepiness in MUM are sensitive to time into race and time-of-day.
ISSN:1543-8627
1543-8635
DOI:10.1080/15438627.2018.1492401