[Comparative urinary elimination of caffeine in sedentary and sportsmen after administration of Guronsan].

Abstract

The authors present the results of a study on urinary excretion of caffeine, after a single oral intake of 100 mg of caffeine, in two populations of students at rest and during exercise. Whether expressed in mg/l or mg/g creatinine no significant difference in urinary excretion of caffeine was observed between the two populations and it proves to be lower than the limit level authorized by the IOC (12 mg/l).