Cited by 252Muscle metabolism and nutritionCardiovascular and exercise physiologyMetabolism, Diabetes, and Cancer

Regulation of Muscle Glycogen Metabolism during Exercise: Implications for Endurance Performance and Training Adaptations

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Hearris, Mark, Hammond, Kelly, Fell, J., Morton, James·2018·Nutrients

Abstract

Since the introduction of the muscle biopsy technique in the late 1960s, our understanding of the regulation of muscle glycogen storage and metabolism has advanced considerably. Muscle glycogenolysis and rates of carbohydrate (CHO) oxidation are affected by factors such as exercise intensity, duration, training status and substrate availability. Such changes to the global exercise stimulus exert regulatory effects on key enzymes and transport proteins via both hormonal control and local allosteric regulation. Given the well-documented effects of high CHO availability on promoting exercise performance, elite endurance athletes are typically advised to ensure high CHO availability before, during and after high-intensity training sessions or competition. Nonetheless, in recognition that the glycogen granule is more than a simple fuel store, it is now also accepted that glycogen is a potent regulator of the molecular cell signaling pathways that regulate the oxidative phenotype. Accordingly, the concept of deliberately training with low CHO availability has now gained increased popularity amongst athletic circles. In this review, we present an overview of the regulatory control of CHO metabolism during exercise (with a specific emphasis on muscle glycogen utilization) in order to discuss the effects of both high and low CHO availability on modulating exercise performance and training adaptations, respectively.

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Authors
Hearris, M., Hammond, K., Fell, J., & Morton, J.
Affiliations
Liverpool John Moores University (GB)
Corresponding author
Morton, James
Venue
Nutrients
Publisher
MDPI AG
Published
2018-03-02
Volume
10
Issue
3
Pages
298
ISSN
2072-6643 (ISSN-L)
OpenAlex
W2792934062
Cited by
252
References
120
Citations by year
2026: 30 · 2025: 31 · 2024: 34 · 2023: 26 · 2022: 38 · 2021: 40 · 2020: 27 · 2019: 17 · 2018: 9
FWCI
2.61
Type
journal article
Language
en
Open access
Locations
  • Nutrients (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Liverpool John Moores University (acceptedVersion)
  • e-space (Manchester Metropolitan University) (acceptedVersion)
  • Figshare (submittedVersion, cc-by)
Funders
GlaxoSmithKline
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
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
Keywords
muscle glycogen metabolism, glycogenolysis, carbohydrate oxidation, endurance performance, training effects, carbohydrate availability, glycogen storage, allosteric regulation, hormonal regulation, exercise intensity
MeSH terms
Adaptation, Physiological, Animals, Dietary Carbohydrates, Energy Metabolism, Glycogen, Humans, Muscle Contraction, Oxidation-Reduction, Phenotype, Physical Endurance, Signal Transduction, Muscle, Skeletal, Diet, Carbohydrate-Restricted

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