Carbohydrate Intake in Form of Gel Is Associated With Increased Gastrointestinal Distress but Not With Performance Differences Compared With Liquid Carbohydrate Ingestion During Simulated Long-Distance Triathlon

International Journal of Sport Nutrition and Exercise Metabolism
Mahdi SarebanGunnar Treff

Abstract

The ingestion of exogenous carbohydrates (CHO) during prolonged endurance exercise, such as long-distance triathlon, is considered beneficial with regard to performance. However, little is known about whether this performance benefit differs among different forms of CHO administration. To this end, the purpose of our study was to determine the impact of CHO ingestion from a semisolid source (GEL) on measures of performance and gastrointestinal (GI) comfort compared with CHO ingestion from a liquid source (LIQ). Nine well-trained triathletes participated in this randomized crossover study. Each participant completed a 60-min swim, 180-min bike exercise, and a 60-min all-out run in a laboratory environment under 2 conditions, once while receiving 67.2 ± 7.2 g · h-1 (M ± SD) of CHO from GEL and once while receiving 67.8 ± 4.2 g · h-1 of CHO from LIQ. The amount of fluid provided was matched among conditions. Respiratory exchange ratio (RER), blood glucose, and lactate as well as GI discomfort were assessed at regular intervals during the experiment. The distance covered during the final all-out run was not significantly different among participants ingesting GEL (11.81 ± 1.38 km) and LIQ (11.91 ± 1.53 km; p = .89). RER, blood gluc...Continue Reading

Citations

Nov 1, 2016·Current Opinion in Gastroenterology·Erick P de Oliveira
Mar 30, 2017·Medicine and Science in Sports and Exercise·David S Rowlands, Stuart D Houltham
Oct 9, 2018·The Journal of Sports Medicine and Physical Fitness·Pedro Belinchón-Demiguel, Vicente J Clemente-Suárez
Oct 11, 2019·European Journal of Applied Physiology·Daniel A BaurChristopher J Womack
Oct 8, 2020·Nutrients·Jacquelyn Pence, Richard J Bloomer

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