Evidence map›Paper›PMID 39350301›Full record

ArticleBMC sports science, medicine & rehabilitation2024

Knee muscle strength, body composition, and balance performance of youth soccer players.

Cíntia França, Francisco Martins, Helder Lopes, Adilson Marques, Marcelo de Maio Nascimento, Krzysztof Przednowek, Andreas Ihle, Pedro Campos, Élvio Rúbio Gouveia

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In one paragraph

Article in BMC sports science, medicine & rehabilitation, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing 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

4 citing papers in PubMed.

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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

9 authors.

Cíntia FrançaDepartment of Physical Education and Sport, University of Madeira, Funchal, 9020-105, Portugal. cintia.franca@staff.uma.pt.
Francisco MartinsDepartment of Physical Education and Sport, University of Madeira, Funchal, 9020-105, Portugal.
Helder LopesDepartment of Physical Education and Sport, University of Madeira, Funchal, 9020-105, Portugal.
Adilson MarquesFaculty of Human Kinetics, CIPER, University of Lisbon, Cruz Quebrada, Lisboa, 1499-002, Portugal.
Marcelo de Maio NascimentoDepartment of Physical Education, Federal University of Vale do São Francisco, Petrolina, 56304- 917, Brazil.
Krzysztof PrzednowekInstitute of Physical Culture Sciences, Medical College, University of Rzeszów, Rzeszów, 35-959, Poland.
Andreas IhleSwiss Center of Expertise in Life Course Research LIVES, Carouge, 1227, Switzerland.
Pedro CamposLARSYS, Interactive Technologies Institute, Funchal, 9020-105, Portugal.
Élvio Rúbio GouveiaDepartment of Physical Education and Sport, University of Madeira, Funchal, 9020-105, Portugal.

Funding

Portuguese Recovery and Resilience Program (PRR), IAPMEI/ANI/FCT Agenda C645022399-00000057 (eGamesLab)
6 · The paper itself

Abstract

backgroundMuscle strength and balance abilities have been related to game performance injury prevention. This study aimed to (1)  assess knee muscle strength performance based on intra- and inter-limb asymmetries, (2)  investigate the relationships between knee muscle strength, body composition, and balance, and (3) analyze the variance in the overall stability index (OSI) explained by knee muscle strength indicators after controlling for age and body composition.

methodsThe sample included 104 young male soccer players (16.0 ± 1.6 years). Body composition, knee muscle strength, and balance ability were assessed. A paired samples t-test was used to examine differences between the preferred leg (PL) and the non-preferred leg (NPL). Pearson correlations and hierarchical multiple regression were conducted to explore the relationships between strength, body composition, and balance.

resultsNo significant inter-limb asymmetries were detected for the knee flexors (KF) and knee extensors (KE) performance. The hamstrings-to-quadriceps ratio does not suggest the existence of intra-limb asymmetries (p = 0.06). Significant and negative correlations were found between KF (r = -0.38, p ≤ 0.01) and KE (r = -0.58, p ≤ 0.01) for the PL. Concerning the NPL, KE also revealed a significant and negative relationship with balance (r = -0.30, p ≤ 0.01). Significant and positive relationships were found between bodyweight, fat-free mass, and balance. After controlling for age and body composition, knee muscle strength could explain between 13% and 30% of the variance observed in the OSI (NPL and PL, respectively).

conclusionsThe results underline knee muscle strength as an important predictor of balance. Thus, training programs targeting knee muscle strength development should be considered during the season periodization by coaches and their staff throughout the players' developmental stages.

Indexed as

BodyweightFat-free massFootballKnee extensorsKnee flexorsStability

Identifiers

PMID39350301
PMCPMC11443753

What OpenQuestion holds

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LicenceCC BY-NC-ND
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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.