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Cited by 38Muscle metabolism and nutritionCardiovascular and exercise physiologySports Performance and Training

Oxidation of Exogenous Carbohydrate During Prolonged Exercise in Fed and Fasted Conditions*

Massicotte, D., Péronnet, F., Brisson, G., Boivin, L., Hillaire-Marcel, C.·1990·International Journal of Sports Medicine
DOI 10.1055/s-2007-1024802
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Abstract

The oxidation of glucose and fructose ingested during moderate exercise performed on a cycle ergometer (120 min, 52% VO2max) was compared in ten young males fasted (n = 5) or fed (n = 5) before exercise. The subjects ingested randomly 1.33 g/kg body weight (approximately 96 +/- 9 g) of either enriched 13C-glucose (G), 13C-fructose (F), or water only (W); the solutions were evenly distributed over the exercise period. The fasted subjects began the three exercises with a lower blood glucose (P less than or equal to 0.05 for F only) and insulin (P less than or equal to 0.05) levels and a higher free fatty acid (FFA) concentration (P less than or equal to 0.05) than the fed ones. Throughout the exercise period, blood glucose level was maintained in fasted as well as in fed group for G and F ingestions, while it decreased (P less than or equal to 0.05 at the 100th min in fasted subjects) with water ingestion. Insulin level was similar in both fed and fasted conditions with F and W ingestions and lower than G trials for the fed subjects. For the three ingestions, FFA was lower (P less than or equal to 0.05) in the fasted than in the fed group over the exercise period. Over the 2-h period of exercise, a greater (P less than or equal to 0.05) amount of exogenous F was oxidized in the fasted (49 +/- 6 g) than in the fed (36 +/- 5 g) group, which represent 31% and 20% of the total carbohydrate energy supply, respectively.(ABSTRACT TRUNCATED AT 250 WORDS)

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  • When only fructose is ingested, exogenous carbohydrate oxidation rates during exercise are equivalent or lower compared to glucose ingestion.

    “When (only) fructose is ingested, exogenous carbohydrate oxidation rates during exercise have been shown to be equivalent (Decombaz et al. 1985; Massicotte et al. 1990; Burelle et al. 2006) or lower compared to glucose ingestion (Massicotte et al. 1986, 1989, 1990; Guezennec et al. 1989; Jandrain et al. 1993; Adopo et al. 1994; Burelle et al. 1997).”

    From Fructose co‐ingestion to increase carbohydrate availability in athletes (2019) · cites this paper as Massicotte et al. 1990

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Authors
Massicotte, D., Péronnet, F., Brisson, G., Boivin, L., & Hillaire-Marcel, C.
Affiliations
Université du Québec à Montréal (CA)
ORCID
Péronnet, F.
Venue
International Journal of Sports Medicine
Publisher
Georg Thieme Verlag KG
Published
1990-08
Volume
11
Issue
04
Pages
253-258
ISSN
  • 0172-4622 (ISSN-L)
  • 1439-3964
DOI
10.1055/s-2007-1024802
OpenAlex
W2039077366
Cited by
38
References
0
Citations by year
2025: 2 · 2020: 2 · 2019: 2 · 2016: 1 · 2014: 1 · 2013: 2 · 2012: 1
FWCI
0.87
Type
journal article
Language
en
Open access
closed
Locations
  • International Journal of Sports Medicine (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
  • Health Sciences › Medicine › Complementary and alternative medicine › Cardiovascular and exercise physiology
  • Health Sciences › Medicine › Orthopedics and Sports Medicine › Sports Performance and Training
Keywords
carbohydrate oxidation, glucose ingestion, fructose ingestion, 13C-labeled glucose, prolonged exercise, insulin, free fatty acids, blood glucose, exercise energy metabolism, water intake
MeSH terms
Dietary Carbohydrates, Eating, Fasting, Fructose, Glucose, Humans, Male, Oxidation-Reduction, Time Factors, Exercise

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