Effects of pre-exercise ingestion of trehalose, galactose and glucose on subsequent metabolism and cycling performance.

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Abstract

The glycaemic and insulinaemic responses to different carbohydrates vary and these have been suggested to affect performance. The purpose of the present study was to determine the effects of pre-exercise ingestion of glucose (GLU), galactose (GAL) and trehalose (TRE) on metabolic responses at rest and during exercise and on subsequent time-trial (TT) performance. Eight well-trained male cyclists completed three exercise trials separated by at least 3 days. At 45 min before the start of exercise subjects consumed 500 ml of a beverage containing 75 g of either glucose, galactose or trehalose. The exercise trials consisted of 20 min of submaximal steady-state exercise (SS) at 65% of maximal power output immediately followed by a [mean (SEM)] 702 (25) kJ TT. Plasma glucose concentration 15 min postprandial was significantly higher in GLU compared to GAL and TRE ( P

Details

Original languageEnglish
Pages (from-to)459-65
Number of pages7
JournalEuropean journal of applied physiology
Volume88
Issue number4-5
Publication statusPublished - 1 Jan 2003