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Effect of caffeine intake on fat oxidation rate during exercise: is there a dose-response effect?
被引:12
作者:
Gutierrez-Hellin, Jorge
[1
]
Aguilar-Navarro, Millan
[1
]
Ruiz-Moreno, Carlos
[2
]
Munoz, Alejandro
[1
]
Varillas-Delgado, David
[1
]
Amaro-Gahete, Francisco J.
[3
]
Del Coso, Juan
[4
]
机构:
[1] Univ Francisco Vitoria, Fac Hlth Sci, Ctra Pozuelo Majadahonda KM 1-800, Madrid 28223, Spain
[2] Camilo Jose Cela Univ, Excercise Physiol Lab, Madrid, Spain
[3] Univ Granada, Sch Med, Dept Med Physiol, Granada, Spain
[4] Rey Juan Carlos Univ, Ctr Sport Studies, Madrid, Spain
关键词:
Endurance exercise;
Substrate oxidation;
Adverse effects;
Stimulant;
Performance;
Lipid oxidation;
IMPROVES PHYSICAL PERFORMANCE;
ENERGY DRINKS;
CARBOHYDRATE;
METABOLISM;
INGESTION;
ENHANCEMENT;
CONSUMPTION;
INTENSITY;
STATEMENT;
D O I:
10.1007/s00394-022-02988-8
中图分类号:
R15 [营养卫生、食品卫生];
TS201 [基础科学];
学科分类号:
100403 ;
摘要:
Purpose The effect of caffeine to enhance fat utilisation as fuel for submaximal aerobic exercise is well established. However, it is unknown whether this effect is dose dependent. The aim of this study was to investigate the effect of 3 and 6 mg of caffeine per kg of body mass (mg/kg) on whole-body substrate oxidation during an incremental cycling exercise test. Methods In a double-blind, randomised, and counterbalanced experiment, 18 recreationally active males (maximal oxygen uptake [VO2max] = 56.7 +/- 8.2 mL/kg/min) performed three experimental trials after ingesting either 3 mg/kg of caffeine, 6 mg/kg of caffeine or a placebo (cellulose). The trials consisted of an incremental exercise test on a cycle ergometer with 3-min stages at workloads from 30 to 80% of VO2max. Energy expenditure, fat oxidation rate, and carbohydrate oxidation rate were continuously measured by indirect calorimetry. Results During exercise, there was significant effect of substance (F = 7.969; P = 0.004) on fat oxidation rate. In comparison to the placebo, the rate of fat oxidation was higher with 3 mg/kg of caffeine at 30, 40, 50 and 70% of VO2max [all P < 0.050, effect sizes (ES) from 0.38 to 0.50] and with 6 mg/kg of caffeine at 30, 40, 50, 60 and 70% of VO2max (all P < 0.050, ES from 0.28 to 0.76). Both 3 mg/kg (0.40 +/- 0.21 g/min, P = 0.021, ES = 0.57) and 6 mg/kg of caffeine (0.40 +/- 0.17 g/min P = 0.001, ES = 0.60) increased the maximal rate of fat oxidation during exercise over the placebo (0.31 +/- 0.15 g/min). None of the caffeine doses produced any significant effect on energy expenditure or heart rate during exercise, while both caffeine doses reduced perceived fatigue at 80% of VO2max (all P < 0.050, ES from 0.71 to 1.48). Conclusion The effect of caffeine to enhance fat oxidation during submaximal aerobic exercise is of similar magnitude with 3 and 6 mg of caffeine per kg of body mass. Thus, a dose of 3 mg of caffeine per kg of body mass would be sufficient to enhance fat utilisation as fuel during submaximal exercise.
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页码:311 / 319
页数:9
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