PMID: 9534083Apr 16, 1998Paper

Blood glucose and glucoregulatory hormone responses to solid and liquid carbohydrate ingestion during exercise

International Journal of Sport Nutrition
R A RobergsC Quinn

Abstract

This study was conducted to compare blood glucose and glucoregulatory hormone responses to the ingestion of solid and liquid carbohydrate (CHO) during prolonged cycling, followed by 30 min of isokinetic cycling. Eight male cyclists randomly completed three cycling trials (LC = liquid CHO, SCE = solid CHO with water equal to LC, SCA = solid CHO + ad libitum water). Each subject cycled for 120 min at 65% of VO2max with CHO ingestion (0.6 g CHO/ kg/hr) at 0, 30, 60, 90, and 120 min. Subjects then completed a 30-min maximal isokinetic ride at 90 rpm. There was no significant (p < .05) difference between the trials for plasma glucose, insulin, glucagon, glycerol, lactate, RER, HR, VO2, RPE, and total work performed during the isokinetic ride. However, serum glucose was significantly lower in the SCE and SCA trials compared to LC at 80 min. The ingestion of a solid food containing CHO, protein, and fat with added water produced similar blood glucose, metabolic, glucoregulatory hormone, and exercise performance responses to those seen with the ingestion of liquid CHO.

Citations

Apr 21, 2010·Medicine and Science in Sports and Exercise·Beate PfeifferAsker E Jeukendrup
Jun 3, 2021·International Journal of Environmental Research and Public Health·Kengo IshiharaYasuyuki Nakamura

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