No Cover Image

Journal article 180 views

Improved end-stage high-intensity performance but similar glycemic responses after waxy barley starch ingestion compared to dextrose in type 1 diabetes / Richard Bracken; Liam Kilduff

The Journal of Sports Medicine and Physical Fitness, Volume: 56, Issue: 11, Pages: 1392 - 1400

Swansea University Authors: Richard, Bracken, Liam, Kilduff

Full text not available from this repository: check for access using links below.

Abstract

BACKGROUND: Pre-exercise carbohydrate (CHO) ingestion is an effective strategy for reducing the occurrence of hypoglycemia during or after exercise in individuals with type 1 diabetes (T1DM). The metabolic effects of ingestion of different CHOs for glycemic or performance gains have been under-resea...

Full description

Published in: The Journal of Sports Medicine and Physical Fitness
ISSN: 0022-4707 1827-1928
Published: 2016
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa50338
Tags: Add Tag
No Tags, Be the first to tag this record!
Abstract: BACKGROUND: Pre-exercise carbohydrate (CHO) ingestion is an effective strategy for reducing the occurrence of hypoglycemia during or after exercise in individuals with type 1 diabetes (T1DM). The metabolic effects of ingestion of different CHOs for glycemic or performance gains have been under-researched. This study compared metabolic responses and fuel use during sub-maximal and high-intensity performance running following pre-exercise ingestion of waxy barley starch (WBS) or dextrose (DEX) in T1DM.METHODS: Seven participants attended the laboratory on two separate occasions following preliminary testing. On each visit participants consumed either 0.6 g/kg body mass of DEX or WBS 2 hours before a 26-minute discontinuous incremental treadmill protocol (4-minute running: 1.5-min rest) finishing at 80±4% V̇O2peak followed by a 10-min performance run on a non-motorized treadmill. Capillary blood samples were taken at rest, during and following exercise and analyzed for glucose (BG) and acid-base variables. Data (mean ± SEM) were analyzed using repeated measures ANOVA (P<0.05).RESULTS: BG reached similar peak values one hour after CHO ingestion and immediate pre-sub-maximal exercise BG were comparable. Resting CHO oxidation was elevated and lipid oxidation lower under WBS (P<0.05). There were no metabolic or cardio-respiratory differences during the sub-maximal exercise (P>0.05). In the final quartile of the performance run, a greater distance was completed under WBS (WBS 323±21 vs. DEX 301±20 m, P=0.02).CONCLUSIONS: Consumption of WBS demonstrated similar hyperglycemic responses to dextrose ingestion but a greater rate of CHO use at rest. Interestingly, T1DM individuals displayed an improved performance at the latter stages of a high-intensity run test.
College: College of Engineering
Issue: 11
Start Page: 1392
End Page: 1400