Evidence map›Paper›PMID 33194322›Full record

ArticlePeerJ2020

Change of direction asymmetry across different age categories in youth soccer.

Athos Trecroci, Alessio Rossi, Thomas Dos'Santos, Damiano Formenti, Luca Cavaggioni, Stefano Longo, F Marcello Iaia, Giampietro Alberti

Abstract read
In one paragraph

Article in PeerJ, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing 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

13 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. Lower-limb asymmetry in healthy male athletes.Journal of physical therapy science · 2025
    Article
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  6. Article
  7. Review
  8. Article
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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

8 authors.

Athos TrecrociDepartment of Biomedical Sciences for Health, Università degli Studi di Milano, Milan, Italy.
Alessio RossiDepartment of Computer Science, University of Pisa, Pisa, Italy.
Thomas Dos'SantosHuman Performance Laboratory, Directorate of Sport, Exercise, and Physiotherapy, University of Salford, Greater Manchester, United Kingdom.
Damiano FormentiDepartment of Biotechnology and Life Sciences (DBSV), University of Insubria, Varese, Italy.
Luca CavaggioniDepartment of Biomedical Sciences for Health, Università degli Studi di Milano, Milan, Italy.
Stefano LongoDepartment of Biomedical Sciences for Health, Università degli Studi di Milano, Milan, Italy.
F Marcello IaiaDepartment of Biomedical Sciences for Health, Università degli Studi di Milano, Milan, Italy.
Giampietro AlbertiDepartment of Biomedical Sciences for Health, Università degli Studi di Milano, Milan, Italy.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundIn youth, the development of change of direction (COD) and sprint performance is a key component for successfully competing in soccer across age. During a COD, the presence of directional asymmetries may be detrimental due to the unpredictable nature of the sport. Therefore, the aims of the study were to investigate asymmetries in COD ability and to examine the differences in COD and sprint performance across age in young soccer players.

methodsSixty-eight sub-elite soccer players of different age categories (U18, U17, U16, U15) were tested on a 10-m linear sprint test and 90°COD (5-m entry and exit) test in both directions. Asymmetric index (AI) of COD deficit was obtained for dominant (fastest) and non-dominant directions (slowest).

resultsThe results showed that U16 were more asymmetrical than U18, U17, and U15 from large to moderate effects. The sprint time improved linearly across age with U18 and U15 displaying the fastest and slowest 10-m sprint performance (

conclusionGiven the results of this study, practitioners are encouraged to assess asymmetries between dominant and non-dominant directions rather than solely players' COD ability in young soccer players.

Indexed as

Change of directionImbalanceLimb dominanceSprintYouth

Identifiers

PMID33194322
PMCPMC7391970

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.