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Cited by 310Muscle metabolism and nutritionSports Performance and TrainingCardiovascular and exercise physiology

The DOI matches its Crossref record; 42 of the 42 references it cites were found in a registry or an index.

Oxidation of combined ingestion of glucose and fructose during exercise

Jentjens, Roy L. P. G., Moseley, Luke, Waring, Rosemary H., Harding, Leslie K., Jeukendrup, Asker E.·2004·Journal of Applied Physiology
DOI 10.1152/japplphysiol.00974.2003
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Abstract

The purpose of the present study was to examine whether combined ingestion of a large amount of fructose and glucose during cycling exercise would lead to exogenous carbohydrate oxidation rates >1 g/min. Eight trained cyclists (maximal O 2 consumption: 62 ± 3 ml·kg-1·min-1) performed four exercise trials in random order. Each trial consisted of 120 min of cycling at 50% maximum power output (63 ± 2% maximal O 2 consumption), while subjects received a solution providing either 1.2 g/min of glucose (Med-Glu), 1.8 g/min of glucose (High-Glu), 0.6 g/min of fructose + 1.2 g/min of glucose (Fruc+Glu), or water. The ingested fructose was labeled with [U-13 C]fructose, and the ingested glucose was labeled with [U-14 C]glucose. Peak exogenous carbohydrate oxidation rates were ∼55% higher ( P < 0.001) in Fruc+Glu (1.26 ± 0.07 g/min) compared with Med-Glu and High-Glu (0.80 ± 0.04 and 0.83 ± 0.05 g/min, respectively). Furthermore, the average exogenous carbohydrate oxidation rates over the 60- to 120-min exercise period were higher ( P < 0.001) in Fruc+Glu compared with Med-Glu and High-Glu (1.16 ± 0.06, 0.75 ± 0.04, and 0.75 ± 0.04 g/min, respectively). There was a trend toward a lower endogenous carbohydrate oxidation in Fruc+Glu compared with the other two carbohydrate trials, but this failed to reach statistical significance ( P = 0.075). The present results demonstrate that, when fructose and glucose are ingested simultaneously at high rates during cycling exercise, exogenous carbohydrate oxidation rates can reach peak values of ∼1.3 g/min.

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Metadata

Authors
Jentjens, R. L. P. G., Moseley, L., Waring, R. H., Harding, L. K., & Jeukendrup, A. E.
Affiliations
University of Birmingham (GB)
ORCID
Waring, Rosemary H.
Venue
Journal of Applied Physiology
Publisher
American Physiological Society
Published
2004-04
Volume
96
Issue
4
Pages
1277-1284
ISSN
  • 0161-7567 (ISSN-L)
  • 8750-7587
  • 1522-1601
DOI
10.1152/japplphysiol.00974.2003
OpenAlex
W2121937652
Cited by
310
References
42
Citations by year
2026: 6 · 2025: 15 · 2024: 4 · 2023: 3 · 2022: 12 · 2021: 13 · 2020: 7 · 2019: 13 · 2018: 5 · 2017: 6 · 2016: 62 · 2015: 11 · 2014: 9 · 2013: 19 · 2012: 13
FWCI
3.83
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Applied Physiology (publishedVersion)
  • PubMed (publishedVersion)
  • University of Birmingham Research Portal (University of Birmingham) (submittedVersion)
Topics
  • Health Sciences › Nursing › Nutrition and Dietetics › Muscle metabolism and nutrition
  • Health Sciences › Medicine › Orthopedics and Sports Medicine › Sports Performance and Training
  • Health Sciences › Medicine › Physiology (medical) › Cardiovascular and exercise physiology
Keywords
carbohydrate oxidation, fructose ingestion, glucose ingestion, exogenous carbohydrate oxidation, cycling exercise, carbohydrate supplementation, trained cyclists, stable isotope tracers
MeSH terms
Administration, Oral, Adult, Blood Glucose, Carbon Isotopes, Carbon Radioisotopes, Dietary Carbohydrates, Drug Combinations, Fats, Fructose, Gastrointestinal Diseases, Glucose, Humans, Lactates, Male, Oxidation-Reduction, Oxygen Consumption, Pulmonary Gas Exchange, Time Factors, Exercise, Incidence, Carbohydrate Metabolism

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