Evidence map›Paper›PMID 38201859›Full record

ArticleNutrients2023

The Effect of Caffeine Supplementation on Female Volleyball Players' Performance and Wellness during a Regular Training Week.

Jesús Siquier-Coll, Gabriel Delgado-García, Fulgencio Soto-Méndez, Antonio Liñán-González, Raquel García, Francisco Tomás González-Fernández

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Nutrients, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 6 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed, 6 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

14 citing papers in PubMed, 6 syntheses or guidelines pooled it.

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  13. Effects of progressiveFrontiers in nutrition · 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

6 authors.

Jesús Siquier-CollDepartment of Communication and Education, Universidad Loyola Andalucía, 41704 Dos Hermanas, Spain.ORCID 0000-0003-3185-3615
Gabriel Delgado-GarcíaSER Research Group, Department of Physical Activity and Sport Sciences, Center of Higher Education Alberta Giménez, Affiliated to Pontifical University of Comillas, 07013 Palma, Spain.
Fulgencio Soto-MéndezSER Research Group, Department of Physical Activity and Sport Sciences, Center of Higher Education Alberta Giménez, Affiliated to Pontifical University of Comillas, 07013 Palma, Spain.ORCID 0000-0001-8593-4037
Antonio Liñán-GonzálezDepartment of Nursing, Faculty of Health Sciences, Melilla Campus, University of Granada, 52005 Melilla, Spain.ORCID 0000-0002-1268-8098
Raquel GarcíaDepartment of Nursing, Faculty of Health Sciences, University of Granada, 18071 Granada, Spain.
Francisco Tomás González-FernándezDepartment of Physical Education and Sports, Faculty of Sport Sciences, University of Granada, 18071 Granada, Spain.ORCID 0000-0002-1480-7521

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundcaffeine is an ergogenic aid that still needs to be investigated in women's sports performance.

methodsEight semi-professional women's volleyball players (height = 1.63 ± 0.08 m; weight = 66.67 ± 4.74 kg) voluntarily participated in this study. A randomized crossover design was implemented where players underwent caffeine and placebo conditions. In the caffeine condition, participants consumed 5 mg/kg of caffeine based on their body weight before acute training. The evaluations were performed over two weeks of training. In both conditions, the countermovement jump, repeated jumps for 15 s, and handgrip tests were performed. The change of direction was assessed using the 505 test. Well-being was also assessed with a wellness questionnaire. A repeated measures ANOVA and correlation analysis were performed.

resultsThe repeated measures ANOVA revealed a main effect of supplementation (

conclusionsCaffeine improved performance and fatigue parameters over one week of training. Further research is needed on women, focusing on physical performance and wellbeing, especially during intense periods.

Indexed as

CaffeineVolleyballDietary SupplementsFatigueFemaleHand StrengthHumansCaffeinecaffeineergogenic aidssport performancesupplementationvolleyball

Identifiers

PMID38201859
PMCPMC10780397

What Socratic 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 Socratic graph.