Metabolic and exercise endurance effects of coffee and caffeine ingestion

Human Biology and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada N1G 2W1 Caffeine (Caf) ingestion increases plasma epinephrine (Epi) and exercise endurance; these results are frequently transferred to coffee (Cof) consumption. We examined the impact of ingestion of the same dose...

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Bibliographic Details
Published in:Journal of applied physiology (1985) 1998-09, Vol.85 (3), p.883-889
Main Authors: Graham, T. E, Hibbert, E, Sathasivam, P
Format: Article
Language:English
Subjects:
Adult
Anatomy & physiology
Biological and medical sciences
Blood Gas Analysis
Blood Glucose - metabolism
Caffeine
Caffeine - blood
Caffeine - pharmacokinetics
Caffeine - pharmacology
Central Nervous System Stimulants - blood
Central Nervous System Stimulants - pharmacokinetics
Central Nervous System Stimulants - pharmacology
Coffee
Epinephrine - blood
Exercise
Female
Glycerol - blood
Hormones
Humans
Lactic Acid - blood
Male
Medical sciences
Metabolism
Metabolism - drug effects
Middle Aged
Neuropharmacology
Norepinephrine - blood
Oxygen Consumption - drug effects
Oxygen Consumption - physiology
Pharmacology. Drug treatments
Physical Endurance - drug effects
Psychoanaleptics: cns stimulant, antidepressant agent, nootropic agent, mood stabilizer..., (alzheimer disease)
Psychology. Psychoanalysis. Psychiatry
Psychopharmacology
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Summary:Human Biology and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada N1G 2W1 Caffeine (Caf) ingestion increases plasma epinephrine (Epi) and exercise endurance; these results are frequently transferred to coffee (Cof) consumption. We examined the impact of ingestion of the same dose of Caf in Cof or in water. Nine healthy, fit, young adults performed five trials after ingesting (double blind) either a capsule (Caf or placebo) with water or Cof (decaffeinated Cof, decaffeinated with Caf added, or regular Cof). In all three Caf trials, the Caf dose was 4.45 mg/kg body wt and the volume of liquid was 7.15 ml/kg. After 1 h of rest, the subject ran at 85% of maximal O 2 consumption until voluntary exhaustion (~32 min in the placebo and decaffeinated Cof tests). In the three Caf trials, the plasma Caf and paraxanthine concentrations were very similar. After 1 h of rest, the plasma Epi was increased ( P  
ISSN:8750-7587
1522-1601
DOI:10.1152/jappl.1998.85.3.883