Abstract (eng)
Background: The influence of carbohydrates on performance in endurance sports has already been studied in great detail. Isomaltulose is a naturally occurring disaccharide consisting of a glucose and a fructose molecule. In contrast to sucrose and maltose, it is hydrolized very slowly in the small intestine. The increase in blood glucose and insulin is therefore flatter compared to other saccharides. For glucose there is already a dose-response relationship with a maximum recommended amount of 90 g/h. However, such data are still pending for isomaltulose.
Objective: The aim of this study was to investigate the dose-response relationship of isomaltulose. The investigation was to be carried out by measuring various power factors during a two-hour continuous cycling test and a final time trial. Based on the results, training recommendations for the dosage of isomaltulose should be given.
Methods: For the empirical work a double-blind, randomized cross-over study with twelve endurance athletes was conducted.
Results and conclusion: For isomaltulose concentrations between 20 and 60 g/h no dose- response relationship could be demonstrated. There is no difference between the concentrations in terms of efficiency, physiological parameters or substrate use. There are also no significant differences between the concentrations in the performance at the final time trial.