Zusammenfassung
Der Glykämische Index (GI) soll die Wirkung eines Lebensmittels auf den Blutglucose-
und Insulinverlauf charakterisieren. Aktuelle Untersuchungen des Instituts für Sporternährung
e.V., Bad Nauheim, und der Sportklinik Bad Nauheim zeigen, dass der experimentell
bestimmte GI nicht immer in Übereinstimmung mit der tatsächlich gemessenen postprandialen
Insulinausschüttung, dem Insulin-Index und dem Insulin-Quotienten steht. Auch die
Vorhersagbarkeit der Glucose- und Insulinsekretion bei komplexen Mahlzeiten ist mit
den GI-Tabellenwerten der einzelnen Lebensmittel nicht immer gegeben. Der direkt ermittelte
Insulin-Index und Insulin-Quotient von Lebensmitteln und Mahlzeiten ermöglicht hingegen
die notwendige ergänzende Bewertung der Lebensmittel, sowohl hinsichtlich des Risikos
der Manifestierung von ernährungsabhängigen Krankheiten, der Entstehung von Übergewicht
als auch der positiven nutritiven Beeinflussung der sportlichen Leistungsfähigkeit.
Summary
Glycemic index and insulin index
The glycemic index (GI) characterises effects of foodstuff intake on glucose and insulin
concentrations in the blood. Tests recently performed by the Institute for Sport Nutrition
at Bad Nauheim, Germany, came to the conclusion that the experimentally determined
GI does not always correspond to actually measured postprandial insulin secretion,
insulin index and insulin quotient. Even the probability of glucose and insulin excretion
in the case of composite meals cannot always be calculated on the basis of tabular
GI values of individual foodstuffs. It is, however, possible to use directly measured
values of both insulin index and insulin quotient of given foodstuffs and meals as
parameters to assess risks of diseases and obesity caused by ingestion of certain
foodstuffs apart from positive or negative influences on sportive capabilities.
Schlüsselwörter
Glykämischer Index - Insulin-Index - Sportler-Ernährung - Ernährungs-beratung
Key words
Glycemic index - insulin index - sport nutrition - nutritional advice
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Björn Erwig
Marburg
Dr. Johannes M. Peil
Sportklinik Bad Nauheim
Günter Wagner
Institut für Sporternährung e.V.
In der Aue 30-32
61231 Bad Nauheim
eMail: g.wagner@isonline.de
