Caffeine increases whole-body fat oxidation during 1 h of cycling at Fatmax
Ruiz-Moreno C, Gutiérrez-Hellín J, Amaro-Gahete FJ, González-García J, Giráldez-Costas V, Pérez-García V, Del Coso J
European journal of nutrition · 27 citas
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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 no declarada
Publicación
- Publicado
- 2020-10-06 · Eur J Nutr · vol. 60 · número 4 · págs. 2077–2085
- Editorial
- Springer Science+Business Media
- Citado
- 36 citas · más que el 90% de estudios similares · 2.6× el promedio de su campo
- Referencias
- 47 trabajos
- Acceso
- Acceso abierto (copia en repositorio) · CC-BY-NC-ND
- Áreas de investigación
- Coffee research and impacts · Muscle metabolism and nutrition · Sports Performance and Training
- Palabras clave
- caffeine, fat oxidation, substrate oxidation, carbohydrate oxidation, cycling, submaximal exercise, energy expenditure, fatigue, blood pressure, ergogenic aids
- MeSH
- adipose tissue, humans, caffeine, calorimetry, indirect, double-blind method, energy metabolism, oxidation-reduction, oxygen consumption
7 autores
- Carlos Ruíz‐Moreno🇪🇸Camilo José Cela University
- Jorge Gutiérrez‐Hellín🇪🇸Universidad Francisco de Vitoria
- Francisco J. Amaro‐Gahete🇪🇸Camilo José Cela University
- Jaime González‐García🇪🇸Camilo José Cela University
- Verónica Giráldez‐Costas🇪🇸Camilo José Cela University; Universidad Autónoma de Madrid
- Víctor M. Pérez‐García🇪🇸Camilo José Cela University
- Juan Del Coso🇪🇸 · autor de correspondenciaUniversidad Rey Juan Carlos
Resumen
El texto original del estudio, en el idioma en que se publicó.
Purpose
The ergogenic effect of caffeine on exercise of maximum intensity has been well established. However, there is controversy regarding the effect of caffeine on shifting substrate oxidation at submaximal exercise. The aim of this study was to investigate the effect of acute caffeine ingestion on whole-body substrate oxidation during 1 h of cycling at the intensity that elicits maximal fat oxidation (Fatmax).
Methods
In a double-blind, randomized, and counterbalanced experiment, 12 healthy participants (VO2max = 50.7 ± 12.1 mL/kg/min) performed two acute experimental trials after ingesting either caffeine (3 mg/kg) or a placebo (cellulose). The trials consisted of 1 h of continuous cycling at Fatmax. Energy expenditure, fat oxidation rate, and carbohydrate oxidation rate were continuously measured by indirect calorimetry.
Results
In comparison to the placebo, caffeine increased the amount of fat oxidized during the trial (19.4 ± 7.7 vs 24.7 ± 9.6 g, respectively; P = 0.04) and decreased the amount of carbohydrate oxidized (94.6 ± 30.9 vs 73.8 ± 32.4 g; P = 0.01) and the mean self-perception of fatigue (Borg scale = 11 ± 2 vs 10 ± 2 arbitrary units; P = 0.05). In contrast, caffeine did not modify total energy expenditure (placebo = 543 ± 175; caffeine = 559 ± 170 kcal; P = 0.60) or mean heart rate (125 ± 13 and 127 ± 9 beats/min; P = 0.30) during exercise. Before exercise, caffeine increased systolic and diastolic blood pressure whilst it increased the feelings of nervousness and vigour after exercise (P < 0.05).
Conclusion
These results suggest that a moderate dose of caffeine (3 mg/kg) increases the amount of fat oxidized during 1 h of cycling at Fatmax. Thus, caffeine might be used as an effective strategy to enhance body fat utilization during submaximal exercise. The occurrence of several side effects should be taken into account when using caffeine to reduce body fat in populations with hypertension or high sensitivity to caffeine.
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