Evidence map›Paper›PMID 31479492›Full record

ArticlePloS one2019

Age and sex-related upper body performance differences in competitive young tennis players.

Jaime Fernandez-Fernandez, Fabio Yuzo Nakamura, Victor Moreno-Perez, Alejandro Lopez-Valenciano, Juan Del Coso, Cesar Gallo-Salazar, David Barbado, Iñaki Ruiz-Perez, David Sanz-Rivas

Abstract read
In one paragraph

Article in PloS one, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed, 2 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

31 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Article
  4. Evaluating tennis player performance based on different types of grip strength.BMC sports science, medicine & rehabilitation · 2026
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  9. Comparative Study in Physical Fitness in Recreative Young Padel Players.Journal of functional morphology and kinesiology · 2025
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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.

Jaime Fernandez-FernandezDepartment of Physical Activity and Sports Sciences, Universidad de León, León, Spain.ORCID 0000-0002-5284-303X
Fabio Yuzo NakamuraAssociate Graduate Program in Physical Education UPE/UFPB, João Pessoa, Paraíba, Brazil.
Victor Moreno-PerezDepartment of Sport Science, Sport Research Centre, Miguel Hernandez University of Elche, Alicante, Spain.
Alejandro Lopez-ValencianoDepartment of Sport Science, Sport Research Centre, Miguel Hernandez University of Elche, Alicante, Spain.ORCID 0000-0002-5443-5101
Juan Del CosoExercise Physiology Laboratory, Camilo José Cela University, Madrid, Spain.ORCID 0000-0002-5785-984X
Cesar Gallo-SalazarExercise Physiology Laboratory, Camilo José Cela University, Madrid, Spain.
David BarbadoDepartment of Sport Science, Sport Research Centre, Miguel Hernandez University of Elche, Alicante, Spain.
Iñaki Ruiz-PerezDepartment of Sport Science, Sport Research Centre, Miguel Hernandez University of Elche, Alicante, Spain.ORCID 0000-0002-6744-2976
David Sanz-RivasTennis Performance Research Group, Madrid, Spain.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveThe aims of this study were to analyze the shoulder functional profile of young male and female tennis players and to establish the relationship among physical variables and serve speed.

methodsA total of 128 Spanish tennis players (Under-13 (n = 32/32 males/females) and Under-15 (n = 36/28 males/females), were tested during National training camps. Tests included passive shoulder range of motion (ROM) for both internal (IR) and external rotation (ER) and isometric strength (i.e., IR and ER) of the dominant/non-dominant shoulders, medicine ball throws (MBT), and serve speed. Age and sex pairwise comparisons were carried using the Hedges' g index (dg).

resultsResults showed age and sex effects on serve speed and all MBT, with males showing greater changes (1.51≤dg≤1.98) with age than females (0.92≤dg≤1.35; p<0.05). U15 males showed higher (p<0.05) absolute shoulder IR and ER strength than U13, with only significant differences between males and females in the U15. Regarding ROM, U15 males showed a decreased IR ROM compared to U13 (dg = -0.84; p<0.05) and higher significant IR bilateral deficit (dg = 0.51; p<0.05). The distances obtained in the different MBT were the variables more correlated to serve speed.

conclusionThe present results suggest that shoulder strength, medicine ball throws and serve speed increased along with age in young elite tennis players of both sexes. However, a decreased range of motion and bilateral deficit for glenohumeral internal rotation is evident in male under-15 tennis players. Muscle strength, power and shoulder range of motion are key factors for serve speed in young tennis players.

Indexed as

AdolescentAge FactorsAthletic PerformanceChildFemaleHumansIsometric ContractionMaleMuscle StrengthRange of Motion, ArticularRotationSex FactorsShoulderShoulder JointSpainTennis

Identifiers

PMID31479492
PMCPMC6719856

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LicenceCC BY
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Registered trials

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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.