Acute Caffeine Administered in Chewing Gum May Improve Functional Firefighting Balance After Gamma-Aminobutyric Acid Supplementation: A Double-Blind Crossover Trial
Tseng MH, Wu CL, Shiu YJ, Tsou YC, Lin HT, Chiu CH
Nutrients · 0 citas
Cómo se estudió
- Diseño
- Ensayo controlado aleatorizado (indexado por PubMed)
- Estudiado en
- Personas
- Resultado principal
- Marcadores de salud y funcionamiento
Quién lo pagó
- Financiación
- Financiación independiente
- Universidad u hospital
- National Taiwan University
Según 1 financiador declarado y la declaración de financiación del texto completo.
Publicación
- Publicado
- 2026-09-02 · Nutrients · vol. 18 · número 17 · pág. 2876
- Editorial
- Multidisciplinary Digital Publishing Institute
- Citado
- 0 citas · más que el 70% de estudios similares · 0.0× el promedio de su campo
- Referencias
- 27 trabajos
- Acceso
- Acceso abierto (revista) · CC-BY
- Áreas de investigación
- Coffee research and impacts · Occupational Health and Performance · Sleep and Work-Related Fatigue
- Palabras clave
- caffeine, firefighters, functional balance, sympathetic activity, heart rate variability, salivary amylase
- MeSH
- humans, gamma-aminobutyric acid, caffeine, cross-over studies, double-blind method, chewing gum, dietary supplements, adult, male, postural balance, firefighters
6 autores
- Mei-Hui Tseng🇹🇼National Chung Hsing University
- Ching-Lin Wu🇹🇼National Chung Hsing University
- Yi-Jie Shiu🇹🇼National Taiwan Normal University
- Yi-Chun Tsou🇹🇼National Taiwan University of Sport
- Hsien-Tsung Lin🇹🇼National Taiwan University of Sport
- Chih‐Hui Chiu🇹🇼 · autor de correspondenciaNational Taiwan University of Sport
Resumen
El texto original del estudio, en el idioma en que se publicó.
Background
This study investigated whether caffeinated chewing gum enhances sympathetic activity and improves functional firefighting balance performance after gamma-aminobutyric acid (GABA) supplementation.
Methods
Fourteen active-duty elite firefighters (age: 36 ± 5 years; height: 174 ± 5 cm; BMI: 25.2 ± 1.6 kg/m2) participated in a double-blind randomized crossover trial. The participants completed functional firefighting balance tests while wearing approximately 25 kg of full firefighting gear. After a 1 h resting period, the participants ingested GABA and rested for an additional 15 min before chewing either caffeine-containing gum (CAF) or caffeine-free gum (CG) for 10 min. Fifteen minutes after gum ingestion, the participants repeated the functional firefighting balance tests. Completion time and performance index were used as the indicators of the functional firefighting balance tests.
Results
The CAF trial demonstrated a significantly better completion time (p = 0.011; Cohen's d = 0.54) and performance index (p = 0.012; Cohen's d = 0.43) compared with the CG trial, with small-to-moderate effect sizes. There were no significant interactions in HR, SDNN, RMSSD, LF and HF (condition*time, p > 0.05). There was a significant interaction in LF/HF (p = 0.040); however, further statistical analysis revealed no significant differences across trials or over time (p > 0.05). Salivary α-amylase concentration was also significantly higher in the CAF trial compared with the CG trial after testing (p = 0.040; Cohen's d = 0.45).
Conclusions
These 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.
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