[Oxidation of 13C-labeled glucose during loading of various intensity].
The purpose of the investigation was to assess the percentage utilization of administered glucose labelled with the natural isotope 13C during an intensive load on a bicycle ergometer (I) (1 hr, 75% VO2max) and a light load (L) (1.5 hr 45% VO2max). In the investigation participated four healthy volunteers who before pedalling drank 1.2 g.kg-1 labelled glucose dissolved in 400 ml water. The oxidation of administered glucose was measured in expired 13CO2. In the course of load I 15% were oxidized and during load L 47% of the administered 13C glucose. The difference in utilization of administered glucose during I and L loads is significant (p less than 0.025). The blood sugar level rose significantly during load I, insulinaemia during load I as well as L, but in load I it was significantly lower as compared with load L (p less than 0.05). This investigation supplements findings on the lower utilization of concentrated glucose solutions during intensive physical loads.
Srámek
P
P
Fakulta tĕlesné výchovy a sportu Univerzity Karlovy, Praha.
Iijima
J
J
Fukushima
H
H
D000328:Adult; D002250:Carbon Radioisotopes; D005947:Glucose / Q000378:metabolism*; D006801:Humans; D010084:Oxidation-Reduction; D010101:Oxygen Consumption; D005082:Physical Exertion
D002250:Carbon Radioisotopes; D005947:Glucose
Oxidace znacené 13C glukózy bĕhem zátĕze různé intenzity.