Evidence map›Paper›PMID 33672683›Full record

ArticleInternational journal of environmental research and public health2021

Sleep Indices and Cardiac Autonomic Activity Responses during an International Tournament in a Youth National Soccer Team.

Pedro Figueiredo, Júlio Costa, Michele Lastella, João Morais, João Brito

Abstract read
In one paragraph

Article in International journal of environmental research and public health, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed, 1 pooled it
–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

13 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Trial
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  6. Article
  7. Article
  8. Identifying Sudden Cardiac Arrest Risk in Adolescent Male Athletes.International journal of exercise science · 2024
    Article
  9. Observational
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  12. Review
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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.

Pedro FigueiredoPortugal Football School, Portuguese Football Federation, FPF, 1495-433 Cruz Quebrada, Portugal.ORCID 0000-0001-5515-3694
Júlio CostaPortugal Football School, Portuguese Football Federation, FPF, 1495-433 Cruz Quebrada, Portugal.ORCID 0000-0002-8225-8667
Michele LastellaAppleton Institute for Behavioural Science, Central Queensland University, Adelaide, QLD 5034, Australia.ORCID 0000-0003-1793-3811
João MoraisPortugal Football School, Portuguese Football Federation, FPF, 1495-433 Cruz Quebrada, Portugal.
João BritoPortugal Football School, Portuguese Football Federation, FPF, 1495-433 Cruz Quebrada, Portugal.ORCID 0000-0003-1301-1078

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

This study aimed to describe habitual sleep and nocturnal cardiac autonomic activity (CAA), and their relationship with training/match load in male youth soccer players during an international tournament. Eighteen elite male youth soccer players (aged 14.8 ± 0.3 years; mean ± SD) participated in the study. Sleep indices were measured using wrist actigraphy, and heart rate (HR) monitors were used to measure CAA during night-sleep throughout 5 consecutive days. Training and match loads were characterized using the session-rating of perceived exertion (s-RPE). During the five nights 8 to 17 players slept less than <8 h and only one to two players had a sleep efficiency <75%. Players' sleep duration coefficient of variation (CV) ranged between 4 and 17%. Nocturnal heart rate variability (HRV) indices for the time-domain analyses ranged from 3.8 (95% confidence interval, 3.6; 4.0) to 4.1 ln[ms] (3.9; 4.3) and for the frequency-domain analyses ranged from 5.9 (5.6; 6.5) to 6.6 (6.3; 7.4). Time-domain HRV CV ranged from 3 to 10% and frequency-domain HRV ranged from 2 to 12%. A moderate within-subjects correlation was found between s-RPE and sleep duration [r = -0.41 (-0.62; -0.14);

Indexed as

SoccerActigraphyAdolescentAutonomic Nervous SystemHeart RateHumansMalePhysical ExertionSleepaccelerometeradolescentfootballmatchparasympathetic systemrecoverysleep durationsleep qualitytraining load

Identifiers

PMID33672683
PMCPMC7924379

What OpenQuestion holds

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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.