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Source study found

Story checked

One good night's sleep reduces fatigue in hockey players (opens in a new tab)

medicalxpress.com · 2026-09-15

Short answerEvidenceSource

Short answer

Mixed

Mixed.

The claims we could check match the study, but some claims were not covered by the evidence reviewed.

  • 3 supported
  • 4 not covered

Checked against the study summary. The full text wasn't available, so some details couldn't be settled either way.

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1
2

NewsLink checks it

Mixed

Every claim we could check holds up. Three of seven claims match the study. This overall rating is based only on the claims we could check. Four claims the study doesn't address.

  • 3 supported
  • 4 not covered
Open claim evidence
3
Source paper

Source layer

The 3 papers the story cites

Source study separated from background citations.

The research anchor for the report.

Then inspect each claim

Evidence layer

Claim by claim

Each claim gets a verdict. Expand it to see the evidence directly below.

7 claims in this story

Showing all 7 claimsChoose a verdict to focus the list.

Claim 1 of 7Not coveredThe experiment included 22 players with an average age of 17, who each had one normal-sleep night and one extended-sleep night in random order, with five days between conditions.View evidenceHide evidence

Why this verdict

The profile supports 22 elite youth hockey players, mean age 17, and a randomized within-subject crossover comparing normal sleep with sleep extension across experimental weeks. However, the specific statement that there were five days between conditions is not available in the abstract-level profile, so the full claim cannot be verified at this evidence depth.

1

Study evidence

Sleep extension (10 h time in bed) increased total sleep time compared with normal sleep.16% ± 11% increase in sleep time, p < 0.001; ηp2 = 0.72

“In this randomised crossover trial, 22 elite youth hockey players ... took part in a 3-week protocol”
Claim 2 of 7Not coveredAfter extended sleep, reaction time on the demanding task improved by 8% and perceived fatigue decreased by 23%.View evidenceHide evidence

As statedreaction time improved by 8%; perceived fatigue decreased by 23%

Why this verdict

The profile supports an 8% improvement in cMSIT performance and a 23% improvement/reduction in perceived fatigue after sleep extension. However, the abstract-level profile does not specify that the cMSIT improvement was specifically reaction time, noting that detailed cMSIT scoring metrics are not provided. The magnitude and fatigue direction are supported, but the reaction-time metric is not verifiable at this depth.

1

Study evidence

Sleep extension (10 h time in bed) increased total sleep time compared with normal sleep.16% ± 11% increase in sleep time, p < 0.001; ηp2 = 0.72

“In this randomised crossover trial, 22 elite youth hockey players ... took part in a 3-week protocol”
Claim 3 of 7Not coveredThe article says the findings cannot be generalized broadly because the study involved only one male team, the players were not blinded to condition, and a placebo effect cannot be ruled out.View evidenceHide evidence

Why this verdict

The profile supports a generalizability limitation for a small sample of elite youth ice-hockey players, with unknown generalizability to other populations. But the abstract-level profile does not state that the sample was one male team, that players were not blinded, that placebo effects cannot be ruled out, or that generalization is especially limited for young female athletes. Those caveats may come from the full article, but they are not verifiable from the supplied abstract-depth profile.

1

Study evidence

Sleep extension (10 h time in bed) increased total sleep time compared with normal sleep.16% ± 11% increase in sleep time, p < 0.001; ηp2 = 0.72

“In this randomised crossover trial, 22 elite youth hockey players ... took part in a 3-week protocol”
2

Study evidence

Sleep duration increased in the sleep extension condition compared with normal sleep.16% ± 11% increase; p < 0.001; ηp2 = 0.72

“Sleep was objectively monitored using actigraphy and sleep logs.”
Claim 4 of 7Not coveredThe paper is published in the Journal of Sleep Research and is titled 'Acute Effects of Sleep Extension on Fatigue, Inhibitory Control, Short-Term Vigilance and Neuromuscular Function in Youth Elite Ice Hockey Players: A Randomised Crossover Trial.'View evidenceHide evidence

Why this verdict

The supplied paper profile includes a document identifier but does not provide the journal name or paper title as profile evidence. Therefore the publication venue and exact title cannot be verified at abstract depth from the supplied profile.

Claim 5 of 7SupportedA study of Quebec Remparts players by Professor Guido Simonelli and his team at Université de Montréal suggests that one night of extended sleep reduces perceived fatigue and boosts performance on demanding cognitive tasks.View evidenceHide evidence

Why this verdict

The abstract-profile supports the core scientific claim: in a randomized crossover trial of 22 elite youth hockey players, a single night of sleep extension was associated with reduced perceived fatigue and improved performance on the prolonged cMSIT cognitive interference task. Because the supplied profile is abstract-level, it does not verify the named professor, institution, or Quebec Remparts attribution, but the presented effect claim is consistent with the paper profile.

1

Study evidence

Sleep extension (10 h time in bed) increased total sleep time compared with normal sleep.16% ± 11% increase in sleep time, p < 0.001; ηp2 = 0.72

“In this randomised crossover trial, 22 elite youth hockey players ... took part in a 3-week protocol”
Claim 6 of 7SupportedDuring the extended-sleep night, players slept an average of 491 minutes versus 424 minutes on a normal night, a 16% increase.View evidenceHide evidence

As stated16% increase

Why this verdict

The profile reports normal sleep of 7:04 ± 0:39 h:mm, which is 424 minutes, and a 16% ± 11% increase in sleep during the extension condition. The stated 491 minutes is approximately implied by applying the reported 16% increase to 424 minutes, although the profile notes that the abstract does not directly report the absolute mean sleep duration in the extension condition.

1

Study evidence

Sleep duration increased in the sleep extension condition compared with normal sleep.16% ± 11% increase; p < 0.001; ηp2 = 0.72

“Sleep was objectively monitored using actigraphy and sleep logs.”
Claim 7 of 7SupportedExtended sleep had no measurable effect on a shorter, three-minute psychomotor vigilance task, nor on jump height or grip strength.View evidenceHide evidence

Why this verdict

The profile reports no between-condition differences for 3-minute PVT performance, countermovement jumps, or handgrip contractions, despite changes across timepoints. The story’s framing as no measurable effect on the short vigilance task and brief strength/power measures is consistent with the abstract-profile.

1

Study evidence

Sleep extension (10 h time in bed) increased total sleep time compared with normal sleep.16% ± 11% increase in sleep time, p < 0.001; ηp2 = 0.72

“In this randomised crossover trial, 22 elite youth hockey players ... took part in a 3-week protocol”
Then look for missing context

Context layer

What the story left out

Important study details the story did not include.

  • Sleep extension was implemented as 10 hours time in bed and objectively monitored using actigraphy and sleep logs.

    The story reports sleep-duration results but does not reflect the 10-hour time-in-bed prescription or the actigraphy/sleep-log monitoring basis, which is a material manipulation-check element in the paper profile.

    From randomised crossover trial

  • Sleep onset latency, wake after sleep onset, and sleep efficiency were similar across normal and sleep-extension conditions.

    The story does not mention the sleep-continuity finding. This is a secondary paper element and helps interpret the sleep manipulation, although it is less central than the main performance and fatigue outcomes.

    From randomised crossover trial

  • The abstract profile does not specify the fatigue scale or detailed scoring/parameters for cMSIT, PVT, countermovement jump, or handgrip outcomes.

    The story does not mention this measurement-detail limitation. This matters especially where the story specifies cMSIT improvement as reaction time, because the abstract profile only says cMSIT performance improved without giving the scoring metric.

    From randomized crossover

6 things the story did carry across
  • Randomized crossover trial in 22 elite youth ice-hockey players, mean age about 17, comparing one night of normal sleep with one night of sleep extension.
  • Sleep extension increased total sleep time by 16% compared with normal sleep; normal sleep was reported as 7:04 ± 0:39 h:mm.
  • After 2 hours of hockey training followed by a 30-minute colour Multi-Source Interference Task, sleep extension was associated with improved prolonged cognitive-task performance and lower perceived fatigue.
  • No between-condition benefit was observed for short 3-minute PVT vigilance testing, countermovement jumps, or handgrip contractions.
  • The paper profile’s limitations include that the intervention was acute and single-night only, with long-term effects not assessed.
  • The paper profile’s limitations include restricted generalizability from elite youth ice-hockey players to other ages, skill levels, sports, or broader populations.
Then read the study layer

Study layer

Study at a glance

Scan the study first. Expand only the parts you want to inspect.

Pieces of work

2

Evidence read

study summary

Lead result

human in vivo

1Lead resulthuman in vivoDetermine whether a single night of sleep extension (10 h time in bed) versus normal sleep acutely improves fatigue, inhibitory control, vigilance, and neuromuscular function in youth elite ice hockey players within a randomized crossover protocol.randomized crossoverExpand

In plain English

Randomised within-subject crossover trial in 22 elite youth ice-hockey players testing whether a single night of sleep extension (10 h time in bed) versus normal sleep acutely affects perceived fatigue, inhibitory control (cMSIT), short-term vigilance (PVT), and neuromuscular function (CMJ, handgrip). Sleep extension increased sleep duration and was associated with improved performance on a prolonged cognitive interference task (cMSIT) and reduced perceived fatigue; short vigilance tests (PVT) and brief neuromuscular tests (CMJ, handgrip) did not differ between conditions.

Key findings

  • Sleep extension (10 h time in bed) increased total sleep time compared with normal sleep.16% ± 11% increase in sleep time, p < 0.001; ηp2 = 0.72
  • Performance on a prolonged demanding inhibitory-control task (30-min cMSIT) improved following sleep extension.8% improvement, p < 0.001; ηp2 = 0.21
“In this randomised crossover trial, 22 elite youth hockey players ... took part in a 3-week protocol”
What this piece can’t prove
  • Intervention and outcomes reflect only acute (single-night) sleep extension; long-term effects not assessed in this abstract.
  • The abstract does not specify the instrument or scale used to assess perceived fatigue, nor detailed scoring/parameters for cMSIT, PVT, CMJ, or handgrip measurements.

1 further detail could not be confirmed from the summary.

2human in vivoVerify that the sleep-extension manipulation actually increases objectively measured sleep (actigraphy/logs) and characterize sleep continuity (SOL, WASO, efficiency) across conditions.randomised crossover trialExpand

In plain English

In a randomized crossover trial of 22 elite youth ice-hockey players, sleep was objectively monitored with actigraphy and sleep logs. A night of prescribed sleep extension (10 h time in bed) produced a 16% ± 11% increase in sleep compared with athletes' normal sleep (normal: 7:04 ± 0:39), while sleep onset latency (SOL), wake after sleep onset (WASO), and sleep efficiency did not differ between conditions.

Key findings

  • Sleep duration increased in the sleep extension condition compared with normal sleep.16% ± 11% increase; p < 0.001; ηp2 = 0.72
  • Sleep continuity metrics (sleep onset latency, WASO, sleep efficiency) did not differ between normal and sleep extension conditions.All p > 0.016; ηp2 ≤ 0.11
“Sleep was objectively monitored using actigraphy and sleep logs.”
What this piece can’t prove

3 further details could not be confirmed from the summary.

Finally, the search trail

Method layer

NewsLink found the paper. Tessa takes you deeper.

NewsLink checks the story. Tessa is where you inspect the paper, authors, evidence, and research context.

Papers considered

The selected paper, plus nearby candidates.

PubMed, Europe PMC, Crossref · 34 candidate papers

SelectedOpen access

Acute Effects of Sleep Extension on Fatigue, Inhibitory Control, Short-Term Vigilance and Neuromuscular Function in Youth Elite Ice Hockey Players: A Randomised Crossover Trial.

Journal of Sleep Research · 2026 · PubMed, Europe PMC, Crossref

Tessa (opens in a new tab)Source (opens in a new tab)
Candidate

Author comment: Sleeping and Thinking: An Examination of Insomnia Symptoms, Global Sleep Health, and Sleep Regularity — R1/PR3

2025 · Crossref

Source (opens in a new tab)

And 28 more candidates considered.