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Nutrients 2016, 8(7), 390;

Substrate Utilization and Cycling Performance Following Palatinose™ Ingestion: A Randomized, Double-Blind, Controlled Trial

Section for Nutrition and Sports, Department of Sports and Sports Science, University of Freiburg, Schwarzwaldstrasse 175, Freiburg 79117, Germany
BENEO-Institute, Wormserstrasse 11, Obrigheim 67283, Germany
Author to whom correspondence should be addressed.
Received: 1 May 2016 / Revised: 8 June 2016 / Accepted: 16 June 2016 / Published: 23 June 2016
(This article belongs to the Special Issue Nutrition, Health and Athletic Performance)
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(1) Objective: To compare the effects of isomaltulose (Palatinose™, PSE) vs. maltodextrin (MDX) ingestion on substrate utilization during endurance exercise and subsequent time trial performance; (2) Methods: 20 male athletes performed two experimental trials with ingestion of either 75 g PSE or MDX 45 min before the start of exercise. The exercise protocol consisted of 90 min cycling (60% VO2max) followed by a time trial; (3) Results: Time trial finishing time (−2.7%, 90% CI: ±3.0%, 89% likely beneficial; p = 0.147) and power output during the final 5 min (+4.6%, 90% CI: ±4.0%, 93% likely beneficial; p = 0.053) were improved with PSE compared with MDX. The blood glucose profile differed between trials (p = 0.013) with PSE resulting in lower glycemia during rest (95%–99% likelihood) and higher blood glucose concentrations during exercise (63%–86% likelihood). In comparison to MDX, fat oxidation was higher (88%–99% likelihood; p = 0.005) and carbohydrate oxidation was lower following PSE intake (85%–96% likelihood; p = 0.002). (4) Conclusion: PSE maintained a more stable blood glucose profile and higher fat oxidation during exercise which resulted in improved cycling performance compared with MDX. These results could be explained by the slower availability and the low-glycemic properties of Palatinose™ allowing a greater reliance on fat oxidation and sparing of glycogen during the initial endurance exercise. View Full-Text
Keywords: isomaltulose; athletic performance; fat oxidation; glycemic index; endurance isomaltulose; athletic performance; fat oxidation; glycemic index; endurance

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König, D.; Zdzieblik, D.; Holz, A.; Theis, S.; Gollhofer, A. Substrate Utilization and Cycling Performance Following Palatinose™ Ingestion: A Randomized, Double-Blind, Controlled Trial. Nutrients 2016, 8, 390.

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