The effects of low- and high-glycemic index meals on time trial performance.

Purpose: The aim of this work was to determine whether the consumption of pre-exercise high- or low-glycemic index (GI) meals has a beneficial effect on time trial performance.

Methods: Eight male cyclists were provided with either a high-GI or low-GI meal, providing 1 g x kg(-1) body mass of carbohydrate, 45 min before performing a 40-km time trial on a Velotron cyclePro.

Results: Time trial performance was significantly improved in the low-GI trial (92.

Effect of the glycaemic index of a pre-exercise meal on metabolism and cycling time trial performance.

This study investigated the effects of low or high glycaemic index (GI) foods consumed prior to a 40 km time trial (TT) on metabolism and subsequent endurance performance. Ten male cyclists consumed high GI or low GI meals, providing 1 g kg(-1) body mass of carbohydrate, 45 min prior to the TT. The TT performance was significantly (p=0.