The Restorative Role of Daytime Naps in Mentally Fatigued Endurance Athletes (Nap&Run)
5. května 2026 aktualizováno: Jacopo Vitale, L.U.de.S. Sagl
The Restorative Role of Daytime Naps in Mentally Fatigued Endurance Athletes: a Randomized Controlled Trial
This randomized, counterbalanced crossover study investigated whether a 30-minute daytime nap can mitigate the effects of experimentally induced mental fatigue in amateur master endurance athletes. Male athletes completed two home-based experimental sessions separated by one week: a mental fatigue condition, in which a 30-minute cognitively demanding task battery preceded the nap, and a control condition, in which participants took only the nap. Sleep parameters during the nap were monitored by wrist actigraphy, and perceived sleep quality was assessed after awakening. Subjective sleepiness, perceived mental fatigue, and cognitive performance were evaluated before the nap, immediately after the nap, and/or 30 minutes after the nap.
The study examined whether mental fatigue influenced nap characteristics and whether the nap improved recovery-related outcomes. The main outcomes included actigraphy-derived nap parameters, perceived sleep quality, sleepiness assessed with the Karolinska Sleepiness Scale, perceived mental fatigue assessed using a visual analogue scale, and cognitive performance assessed with a Flanker task.
Přehled studie
Postavení
Dokončeno
Intervence / Léčba
Typ studie
Intervenční
Zápis (Aktuální)
11
Fáze
- Nelze použít
Kontakty a umístění
Tato část poskytuje kontaktní údaje pro ty, kteří studii provádějí, a informace o tom, kde se tato studie provádí.
Studijní místa
-
-
-
Milan, Itálie
- University of Milan
-
-
Kritéria účasti
Výzkumníci hledají lidi, kteří odpovídají určitému popisu, kterému se říká kritéria způsobilosti. Některé příklady těchto kritérií jsou celkový zdravotní stav osoby nebo předchozí léčba.
Kritéria způsobilosti
Věk způsobilý ke studiu
- Dospělý
Přijímá zdravé dobrovolníky
Ne
Popis
Inclusion Criteria:
- Male amateur master endurance athletes
- Age between 28 and 50 years
- Peak oxygen uptake (VO₂peak) ≥55 mL·kg-¹·min-¹
- Habitual nocturnal sleep duration of at least 7 hours
- Able and willing to complete both experimental sessions and daytime nap procedures
Exclusion Criteria:
- Diagnosed medical condition or injury
- Diagnosed sleep disorder
- Use of medications or supplements affecting sleep or cognition, including melatonin
- Habitual sleep duration of less than 7 hours per night
- Inability to nap during the experimental sessions
Studijní plán
Tato část poskytuje podrobnosti o studijním plánu, včetně toho, jak je studie navržena a co studie měří.
Jak je studie koncipována?
Detaily designu
- Primární účel: Léčba
- Přidělení: Randomizované
- Intervenční model: Crossover Assignment
- Maskování: Singl
Zbraně a zásahy
Skupina účastníků / Arm |
Intervence / Léčba |
|---|---|
|
Experimentální: Mental Fatigue + Daytime Nap
Participants completed a 30-minute mental fatigue induction protocol consisting of cognitively demanding tasks, followed by a 30-minute daytime nap performed at home between 14:00 and 15:00.
Subjective sleepiness, perceived mental fatigue, nap characteristics, perceived sleep quality, and cognitive performance were assessed before and/or after the nap.
|
Participants completed a 30-minute computerized cognitive task battery designed to induce mental fatigue before the daytime nap.
The protocol consisted of three consecutive 10-minute cognitively demanding tasks: a Flanker task, a memory task, and a Stroop task.
Participants took a 30-minute daytime nap at home between 14:00 and 15:00, at least one hour after lunch, in a quiet and dimly lit room.
Nap characteristics were monitored using wrist actigraphy, and perceived sleep quality was assessed after awakening.
|
|
Aktivní komparátor: Daytime Nap Control
Participants completed the control condition consisting of a 30-minute daytime nap performed at home between 14:00 and 15:00, without the preceding mental fatigue induction protocol.
Subjective sleepiness, perceived mental fatigue, nap characteristics, perceived sleep quality, and cognitive performance were assessed before and/or after the nap.
|
Participants took a 30-minute daytime nap at home between 14:00 and 15:00, at least one hour after lunch, in a quiet and dimly lit room.
Nap characteristics were monitored using wrist actigraphy, and perceived sleep quality was assessed after awakening.
|
Co je měření studie?
Primární výstupní opatření
Měření výsledku |
Popis opatření |
Časové okno |
|---|---|---|
|
Perceived mental fatigue
Časové okno: Before the nap, immediately after the nap, and 30 minutes after the nap in each experimental condition.
|
Perceived mental fatigue was assessed using a 100-mm visual analogue scale for mental fatigue (VAS-MF), anchored from 0-mm "No mental fatigue" to 100-mm "Maximum mental fatigue."
Participants marked the point that best represented their perceived level of mental fatigue.
|
Before the nap, immediately after the nap, and 30 minutes after the nap in each experimental condition.
|
Sekundární výstupní opatření
Měření výsledku |
Popis opatření |
Časové okno |
|---|---|---|
|
Subjective sleepiness
Časové okno: Before the nap, immediately after the nap, and 30 minutes after the nap
|
Subjective sleepiness was assessed using the Karolinska Sleepiness Scale (KSS), a 9-point scale ranging from 1, "not sleepy at all," to 9, "extremely sleepy."
|
Before the nap, immediately after the nap, and 30 minutes after the nap
|
|
Flanker Task Reaction Time
Časové okno: 30 minutes after the nap in each experimental condition.
|
Accuracy during the computerized Flanker task was calculated as the percentage of correct responses and used as an indicator of executive function performance.
Accuracy ranges from 0 to 100%.
|
30 minutes after the nap in each experimental condition.
|
|
Perceived Nap Sleep Quality
Časové okno: Immediately after the nap in each experimental condition.
|
Perceived sleep quality after the nap was assessed using a 10-point Likert scale, from 0 to 10, with higher scores indicating better perceived sleep quality.
|
Immediately after the nap in each experimental condition.
|
|
Actigraphy-Derived nap start time
Časové okno: During the 30-minute daytime nap in each experimental condition.
|
Clock time at which the nap period begins, usually identified from the rest interval or sleep diary.
Nap start time is expressed as clock time, using the 24-hour format.
|
During the 30-minute daytime nap in each experimental condition.
|
|
Actigraphy-Derived nap time in bed
Časové okno: During the 30-minute daytime nap in each experimental condition.
|
Total time spent in bed or within the defined nap/rest interval, from nap start time to nap end time.
Values are expressed in minutes.
|
During the 30-minute daytime nap in each experimental condition.
|
|
Actigraphy-Derived nap total sleep time
Časové okno: During the 30-minute daytime nap in each experimental condition.
|
Total duration of epochs scored as sleep during the nap/rest interval.
Values are expressed in minutes.
|
During the 30-minute daytime nap in each experimental condition.
|
|
Actigraphy-Derived nap sleep onset latency
Časové okno: During the 30-minute daytime nap in each experimental condition.
|
Time elapsed between nap start time and the first epoch scored as sleep.
Values are expressed in minutes.
|
During the 30-minute daytime nap in each experimental condition.
|
|
Actigraphy-Derived nap sleep efficiency
Časové okno: During the 30-minute daytime nap in each experimental condition.
|
Sleep efficiency is expressed as a percentage, ranging from 0% to 100%, and is calculated as the ratio between total sleep time and time in bed multiplied by 100
|
During the 30-minute daytime nap in each experimental condition.
|
|
Actigraphy-Derived nap fragmentation index
Časové okno: During the 30-minute daytime nap in each experimental condition.
|
An index reflecting sleep disruption or restlessness, based on movement and short immobility bouts during the sleep period.
Higher values indicate more fragmented sleep.
Fragmentation index is expressed as a percentage from 0% to 100%
|
During the 30-minute daytime nap in each experimental condition.
|
Spolupracovníci a vyšetřovatelé
Zde najdete lidi a organizace zapojené do této studie.
Publikace a užitečné odkazy
Osoba odpovědná za zadávání informací o studiu tyto publikace poskytuje dobrovolně. Mohou se týkat čehokoli, co souvisí se studiem.
Obecné publikace
- Kaida K, Takahashi M, Akerstedt T, Nakata A, Otsuka Y, Haratani T, Fukasawa K. Validation of the Karolinska sleepiness scale against performance and EEG variables. Clin Neurophysiol. 2006 Jul;117(7):1574-81. doi: 10.1016/j.clinph.2006.03.011. Epub 2006 May 6.
- Van Cutsem J, Marcora S, De Pauw K, Bailey S, Meeusen R, Roelands B. The Effects of Mental Fatigue on Physical Performance: A Systematic Review. Sports Med. 2017 Aug;47(8):1569-1588. doi: 10.1007/s40279-016-0672-0.
- Marcora SM, Staiano W, Manning V. Mental fatigue impairs physical performance in humans. J Appl Physiol (1985). 2009 Mar;106(3):857-64. doi: 10.1152/japplphysiol.91324.2008. Epub 2009 Jan 8.
- Macari M, Pela IR, Silva CA, Viana RS. Fever response induced by intravenous and intracerebroventricular injection of pyrogen in thyroidectomised and protein-calorie malnourished rabbits. Pflugers Arch. 1990 Jan;415(4):440-3. doi: 10.1007/BF00373621.
- Mesas AE, Nunez de Arenas-Arroyo S, Martinez-Vizcaino V, Garrido-Miguel M, Fernandez-Rodriguez R, Bizzozero-Peroni B, Torres-Costoso AI. Is daytime napping an effective strategy to improve sport-related cognitive and physical performance and reduce fatigue? A systematic review and meta-analysis of randomised controlled trials. Br J Sports Med. 2023 Apr;57(7):417-426. doi: 10.1136/bjsports-2022-106355. Epub 2023 Jan 23.
- Lastella M, Halson SL, Vitale JA, Memon AR, Vincent GE. To Nap or Not to Nap? A Systematic Review Evaluating Napping Behavior in Athletes and the Impact on Various Measures of Athletic Performance. Nat Sci Sleep. 2021 Jun 24;13:841-862. doi: 10.2147/NSS.S315556. eCollection 2021.
Termíny studijních záznamů
Tato data sledují průběh záznamů studie a předkládání souhrnných výsledků na ClinicalTrials.gov. Záznamy ze studií a hlášené výsledky jsou před zveřejněním na veřejné webové stránce přezkoumány Národní lékařskou knihovnou (NLM), aby se ujistily, že splňují specifické standardy kontroly kvality.
Hlavní termíny studia
Začátek studia (Aktuální)
11. ledna 2021
Primární dokončení (Aktuální)
15. května 2021
Dokončení studie (Aktuální)
15. května 2021
Termíny zápisu do studia
První předloženo
28. dubna 2026
První předloženo, které splnilo kritéria kontroly kvality
5. května 2026
První zveřejněno (Aktuální)
12. května 2026
Aktualizace studijních záznamů
Poslední zveřejněná aktualizace (Aktuální)
12. května 2026
Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality
5. května 2026
Naposledy ověřeno
1. května 2026
Více informací
Termíny související s touto studií
Klíčová slova
Další relevantní podmínky MeSH
Další identifikační čísla studie
- Nap&Run01
Plán pro data jednotlivých účastníků (IPD)
Plánujete sdílet data jednotlivých účastníků (IPD)?
NE
Popis plánu IPD
Individual participant data will not be made publicly available.
Data supporting the findings of this study may be available from the corresponding author upon reasonable request.
Informace o lécích a zařízeních, studijní dokumenty
Studuje lékový produkt regulovaný americkým FDA
Ne
Studuje produkt zařízení regulovaný americkým úřadem FDA
Ne
Tyto informace byly beze změn načteny přímo z webu clinicaltrials.gov. Máte-li jakékoli požadavky na změnu, odstranění nebo aktualizaci podrobností studie, kontaktujte prosím register@clinicaltrials.gov. Jakmile bude změna implementována na clinicaltrials.gov, bude automaticky aktualizována i na našem webu .