Acute Caffeine Administered in Chewing Gum May Improve Functional Firefighting Balance After Gamma-Aminobutyric Acid Supplementation: A Double-Blind Crossover Trial.

Mei-Hui Tseng, Ching-Lin Wu, Yi-Jie Shiu, Yi-Chun Tsou, Hsien-Tsung Lin, Chih-Hui Chiu

Abstract readRandomized Controlled Trial

In one paragraph

Trial report in Nutrients, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it

0cells of the map it votes in

0citing 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

0 citing papers in PubMed.

No citing paper in PubMed yet.

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.

Mei-Hui TsengInstitute of Biomedical Sciences, National Chung Hsing University, Taichung 402202, Taiwan.

Ching-Lin WuGraduate Institute of Sports and Health Management, National Chung Hsing University, Taichung 402202, Taiwan.ORCID 0000-0002-6676-9344

Yi-Jie ShiuPhysical Education and Sport Sciences, National Taiwan Normal University, Taipei 106308, Taiwan.

Yi-Chun TsouGraduate Program in Department of Exercise and Health Science, National Taiwan University of Sport, Taichung 404401, Taiwan.

Hsien-Tsung LinGraduate Program in Department of Exercise and Health Science, National Taiwan University of Sport, Taichung 404401, Taiwan.

Chih-Hui ChiuGraduate Program in Department of Exercise and Health Science, National Taiwan University of Sport, Taichung 404401, Taiwan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThis study investigated whether caffeinated chewing gum enhances sympathetic activity and improves functional firefighting balance performance after gamma-aminobutyric acid (GABA) supplementation.

methodsFourteen active-duty elite firefighters (age: 36 ± 5 years; height: 174 ± 5 cm; BMI: 25.2 ± 1.6 kg/m

resultsThe CAF trial demonstrated a significantly better completion time (

conclusionsThese findings suggest that caffeinated chewing gum may enhance functional balance performance with a small effect size after GABA supplementation. The increased activity of the sympathetic nervous system may be one of the reasons for improved functional firefighting balance performance.

Indexed as

CaffeineChewing GumDietary SupplementsFirefightersgamma-Aminobutyric AcidPostural BalanceAdultCross-Over StudiesDouble-Blind MethodHumansMaleCaffeineChewing Gumgamma-Aminobutyric Acidcaffeinefirefighting balanceheart-rate variabilitysympathetic nervous systemα-amylase

Identifiers

PMID42739045

DOI10.3390/nu18172876

PMCPMC13567221

What OpenQuestion holds

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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.