Cited by 79Muscle metabolism and nutritionFood composition and propertiesDiet, Metabolism, and Disease

The influence of the glycaemic index of breakfast and lunch on substrate utilisation during the postprandial periods and subsequent exercise

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Stevenson, Emma, Williams, Clyde, Nute, Maria·2005·British Journal of Nutrition

Abstract

The present study investigated the effects of mixed high-carbohydrate (CHO) meals (breakfast and lunch) with different glycaemic indices (GI) on substrate metabolism during rest throughout the postprandial periods and during subsequent exercise. Nine recreationally active males completed two trials, high glycaemic index (HGI) and low glycaemic index (LGI), separated by 7 d in a randomised crossover design. In each trial, participants consumed breakfast and lunch, both of which were followed by a 3 h resting postprandial period. Following this, participants completed a 60 min run at 70 % of V˙O 2max. The plasma glucose and serum insulin concentrations following both meals were significantly higher in the HGI trial than in the LGI trial (P<0·05). Serum insulin concentrations remained higher throughout the postprandial period following lunch in the HGI trial compared with the LGI trial (P<0·05). The total amount of fat oxidised was higher during the 3 h rest following lunch in the LGI trial than in the HGI trial (P<0·01) and subsequently CHO oxidation was lower (P<0·005). No significant differences in substrate utilisation were observed throughout the subsequent run. At 45 and 60 min, plasma glucose concentrations were higher in the LGI trial v. the HGI trial (P<0·05). The results of the present study provide further support that the GI concept can be successfully applied to mixed meals. The results also suggest that meals composed of LGI CHO may be more beneficial for maintaining a favourable metabolic milieu during the postprandial periods. Furthermore, during subsequent exercise, plasma glucose concentrations were better maintained following the LGI CHO meals.

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  • The influence of glycemic index on subsequent exercise performance appears inconsistent.

    “However, the influence of GI on subsequent exercise performance appears inconsistent.”

    From Nutritional Strategies to Improve Post-exercise Recovery and Subsequent Exercise Performance: A Narrative Review (2025) · cites this paper as [43]

    The study’s Abstract and Discussion report substrate utilisation during a fixed-duration run, not whether GI affects exercise performance inconsistently. A search for exercise performance and conflicting findings found references to performance studies, but no passage in our copy assessing the consistency of their results. (LLM, conf=0.76)

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Authors
Stevenson, E., Williams, C., & Nute, M.
Affiliations
Loughborough University (GB)
Corresponding author
Williams, Clyde
Venue
British Journal of Nutrition
Published
2005-06
Volume
93
Issue
6
Pages
885-893
ISSN
  • 0007-1145 (ISSN-L)
  • 1475-2662
OpenAlex
W2113652122
Cited by
78
References
34
Citations by year
2026: 1 · 2025: 1 · 2024: 1 · 2023: 3 · 2022: 1 · 2021: 2 · 2020: 3 · 2019: 2 · 2018: 2 · 2017: 2 · 2016: 2 · 2015: 2 · 2014: 2 · 2012: 7
FWCI
2.98
Type
journal article
Language
en
Open access
Locations
  • British Journal Of Nutrition (publishedVersion)
  • PubMed (publishedVersion)
  • Northumbria Research Link (Northumbria University) (acceptedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
  • Health Sciences › Nursing › Nutrition and Dietetics › Food composition and properties
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diet, Metabolism, and Disease
Keywords
glycemic index, fat oxidation, carbohydrate oxidation, plasma glucose, serum insulin, mixed meal
MeSH terms
Adult, Blood Glucose, Dietary Carbohydrates, Dietary Fats, Fatty Acids, Nonesterified, Glycerol, Humans, Insulin, Lactates, Male, Oxidation-Reduction, Plasma Volume, Exercise, Cross-Over Studies, Postprandial Period, Glycemic Index

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