How Well Do Young Male Semi-Professional Soccer Players Sleep During an Afternoon Nap?

Charli Sargent, Georgia Romyn, Michele Lastella, Dean J Miller, Gregory D Roach

Abstract read

In one paragraph

Article in Clocks & sleep, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it

0cells of the map it votes in

0citing papers in PubMed

–field-weighted citation impact

1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Charli SargentAppleton Institute for Behavioural Science, Central Queensland University, P.O. Box 42, Wayville, SA 5034, Australia.ORCID 0000-0001-5340-4701

Georgia RomynAppleton Institute for Behavioural Science, Central Queensland University, P.O. Box 42, Wayville, SA 5034, Australia.ORCID 0000-0003-1241-2523

Michele LastellaAppleton Institute for Behavioural Science, Central Queensland University, P.O. Box 42, Wayville, SA 5034, Australia.ORCID 0000-0003-1793-3811

Dean J MillerAppleton Institute for Behavioural Science, Central Queensland University, P.O. Box 42, Wayville, SA 5034, Australia.ORCID 0000-0003-3869-4346

Gregory D RoachAppleton Institute for Behavioural Science, Central Queensland University, P.O. Box 42, Wayville, SA 5034, Australia.ORCID 0000-0003-4005-1243

Funding

Australian Institute of Sport

6 · The paper itself

Abstract

Athletes often experience situations in which they do not obtain adequate sleep at night. One strategy to overcome this issue is to supplement nighttime sleep with a daytime nap. However, little is known about how well athletes sleep during daytime naps. The aims of this study were to (i) determine the ability of athletes to fall asleep during an afternoon nap and (ii) examine the composition of the sleep obtained. In a counterbalanced, repeated-measures cross-over design, 12 young male semi-professional soccer players were given a 1 h (15:00-16:00) or 2 h (14:00-16:00) nap opportunity following a normal night's sleep (7-8 h time in bed) in a laboratory. Sleep was monitored using polysomnography and variables were compared between naps using generalized estimating equation models. In the 1 h nap, participants took 6.5 min to fall asleep and spent 52/60 min asleep (87% efficiency); in the 2 h nap, participants took 7.5 min to fall asleep and spent 105/120 min asleep (87% efficiency). There was no difference in wake after sleep onset (

Indexed as

daytime sleepinessfootballpolysomnographyREM sleepsleep latencyslow-wave sleepsport

Identifiers

PMID42496251

DOI10.3390/clockssleep8030044

PMCPMC13398262

What OpenQuestion holds

Textmetadata

LicenceCC BY

Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.