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Title: Early advancing age alters plasma glucose and glucoregulatory hormones in response to supramaximal exercise
Authors: Zouhal, Hassane
Vincent, Sophie
Moussa, Elie 
Botcazou, Maïtel
Delamarche, Paul
Delamarche, Arlette Gratas
Affiliations: Department of Physical Education 
Keywords: Early aging
Wingate test
Subjects: Glucose
Issue Date: 2009
Part of: Journal of science and medicine in sport
Volume: 12
Issue: 6
Start page: 652
End page: 656
After the age of 60, the decrease in physical activity and the increase in fat mass (FM) are two essential factors contributing to the alteration of glucose, insulin, and catecholamines responses induced by exercise. To discard these two factors, we compared the glucoregulatory responses in three different groups of men between the ages 21 and 34, and matched pairs: trained groups (T34 and T21) were matched for training level; T21 and U21 (U for untrained) were matched for age; T34 and U21 were matched for FM. The glucoregulatory responses were determined by venous plasma concentrations of glucose ([GLU]), insulin ([INS]), and catecholamines (adrenaline: [A], noradrenaline: [NA]) before and after a Wingate test. [GLU], [INS], and [A] did not differ between T21 and U21, indicating that high-level training had no effects on these parameters. On the other hand, T34 compared to T21 and U21, had higher GLU associated with lower INS post-exercise concentrations. Moreover, [Amax] was significantly lower in this group. Consequently, T34 only exhibited a significant alteration in glucose and glucoregulatory responses after a Wingate test, which could not be explained by the usual decrease in physical activity and/or the increase in FM. Therefore, aging alone seems to be one main factor of this deterioration.
DOI: 10.1016/j.jsams.2008.03.003
Ezproxy URL: Link to full text
Type: Journal Article
Appears in Collections:Department of Physical Education

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