Addition of pectin-alginate to a carbohydrate beverage does not maintain gastrointestinal barrier function during exercise in hot-humid conditions better than carbohydrate ingestion alone

Flood, T. R., Montanari, S., Wicks, M., Blanchard, J., Sharpe, H., Taylor, L., Kuennen, M. R. and Lee, B. J. (2020) Addition of pectin-alginate to a carbohydrate beverage does not maintain gastrointestinal barrier function during exercise in hot-humid conditions better than carbohydrate ingestion alone. Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme, 45 (10). pp. 1145-1155. ISSN 1715-5320

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Abstract

To compare the effects of consuming a 16% maltodextrin+fructose+pectin alginate (MAL+FRU+PEC+ALG) drink against a nutrient matched maltodextrin-fructose (MAL+FRU) drink on enterocyte damage and gastrointestinal permeability after cycling in hot and humid conditions. Fourteen recreational cyclists (7 men) completed three experimental trials in a randomized placebo-controlled design. Participants cycled for 90 min (45% VO2max) and completed a 15 min time-trial in hot (32°C) humid (70% relative humidity) conditions. Every 15-minutes cyclists consumed 143 mL of either (1) water; (2) MAL+FRU+PEC+ALG (90g CHO.hr/16% w/v), (3) - a ratio-matched MAL+FRU drink also (90g CHO.hr/16% w/v). Blood was sampled before and after exercise and gastrointestinal (GI) permeability determined by serum measurements of intestinal fatty acid-binding protein (IFABP) and the percent ratio of lactulose (5g) to rhamnose (2g) recovered in post-exercise urine. Compared to WATER, IFABP decreased by 349±67pg.mL-1 with MAL+FRU+PEC+ALG (p=0.007), and by 427±56pg.mL-1 with MAL+FRU (p=0.02). GI permeability was reduced in both the MAL+FRU+PEC+ALG (by 0.019±0.01, p = 0.0003) and MAL+FRU (by 0.014±0.01, p = 0.002) conditions relative to WATER. Both CHO beverages attenuated GI barrier damage to a similar extent relative to water. No metabolic, cardiovascular, thermoregulatory or performance differences were observed between the CHO beverages. Novelty bullets • Consumption of multiple-transportable CHO, with or without hydrogel properties, preserves GI barrier integrity and reduces enterocyte damage during prolonged cycling in hot-humid conditions.

Item Type: Article
Uncontrolled Keywords: Nutrition and Dietetics, Physiology (medical), Physiology, Endocrinology, Diabetes and Metabolism, General Medicine
Subjects: G Geography. Anthropology. Recreation > GV Recreation Leisure > GV557 Sports
Q Science > QP Physiology
R Medicine > RC Internal medicine > RC1200 Sports Medicine
Divisions: Academic Areas > Institute of Sport > Area > Exercise Physiology
SWORD Depositor: Publications Router Jisc
Depositing User: Publications Router Jisc
Date Deposited: 19 May 2020 10:24
Last Modified: 16 Oct 2020 10:53
URI: https://eprints.chi.ac.uk/id/eprint/5154

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