Cited by 60Muscle metabolism and nutritionSports Performance and TrainingCardiovascular and exercise physiology

Effect of muscle glycogen availability on maximal exercise performance

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Hargreaves, Mark, Finn, J. Paul, Withers, R. T., Scroop, Garry C., Mackay, Malcolm, Snow, Rodney J., Carey, Michael F., Halbert, J.·1997·European Journal of Applied Physiology

Abstract

This investigation determined the influence of pre-exercise muscle glycogen availability on performance during high intensity exercise. Nine trained male cyclists were studied during 75 s of all-out exercise on an air-braked cycle ergometer following muscle glycogen-lowering exercise and consumption of diets (energy content approximately 14 MJ) that were either high (HCHO(80% CHO) or low (LCHO-25% CHO) in carbohydrate content. The exercise-diet regimen was successful in producing differences in pre-exercise muscle glycogen contents [HCHO: 578(SEM 55) mmol x kg(-1) dry mass; LCHO: 364 (SEM 58) P < 0.05 mmol x kg(-1) dry mass]. Despite this difference in muscle glycogen availability, there were no between trial differences for peak power [HCHO 1185 (SEM 50)W, LCHO 1179 (SEM 48)W], mean power [HCHO 547 (SEM 5)W, LCHO 554 (SEM 8)W] and maximal accumulated oxygen deficit [HCHO 54.4 (SEM 2.3) ml x kg(-1), LCHO 54.6 (SEM 2.0) ml x kg(-1)]. Postexercise muscle lactate contents (HCHO 95.9 (SEM 4.6) mmol x kg(-1) dry mass, LCHO 82.7 (SEM 12.3) mmol x kg(-1) dry mass, n = 8] were no different between the two trials, nor were venous blood lactate concentrations immediately after and during recovery from exercise. These results would indicate that increased muscle glycogen availability has no direct effect on performance during all-out high intensity exercise.

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Crossref · 10.1007/s004210050146

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Authors
Hargreaves, M., Finn, J. P., Withers, R. T., Scroop, G. C., Mackay, M., Snow, R. J., Carey, M. F., & Halbert, J.
Affiliations
  • The University of Melbourne (AU)
  • Flinders University (AU)
  • The University of Adelaide (AU)
  • Victoria University (AU)
Venue
European Journal of Applied Physiology
Published
1997-01-01
Volume
75
Issue
2
Pages
188-192
ISSN
  • 0020-9376 (ISSN-L)
  • 1439-6319
  • 1439-6327
OpenAlex
W2044902916
Cited by
60
References
25
Citations by year
2025: 4 · 2024: 2 · 2023: 2 · 2022: 4 · 2021: 1 · 2020: 1 · 2019: 1 · 2018: 1 · 2017: 2 · 2016: 1 · 2015: 1 · 2014: 4
FWCI
1.24
Type
journal article
Language
en
Open access
Locations
  • European Journal of Applied Physiology (publishedVersion)
  • PubMed (publishedVersion)
  • Adelaide Research & Scholarship (AR&S) (University of Adelaide) (submittedVersion)
  • Figshare (submittedVersion, cc-by)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
  • Health Sciences › Medicine › Orthopedics and Sports Medicine › Sports Performance and Training
  • Health Sciences › Medicine › Complementary and alternative medicine › Cardiovascular and exercise physiology
Keywords
muscle glycogen, high-intensity exercise, all-out exercise, peak power, carbohydrate intake, high-carbohydrate diet, low-carbohydrate diet, oxygen deficit
MeSH terms
Adult, Glycogen, Humans, Lactates, Male, Muscles, Exercise

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