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Skeletal muscle gly...
Skeletal muscle glycogen content and particle size of distinct subcellular localizations in the recovery period after a high-level soccer match
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- Nielsen, Joachim (författare)
- Institute of Sports Science and Clinical Biomechanics, University of Southern Denmark, 5230 Odense M, Denmark
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- Krustrup, Peter (författare)
- Section of Human Physiology, Department of Exercise and Sport Sciences, University of Copenhagen, Copenhagen, Denmark
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- Nybo, Lars (författare)
- Section of Human Physiology, Department of Exercise and Sport Sciences, University of Copenhagen, Copenhagen, Denmark
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- Gunnarsson, Thomas P. (författare)
- Section of Human Physiology, Department of Exercise and Sport Sciences, University of Copenhagen, Copenhagen, Denmark
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- Madsen, Klavs (författare)
- Department of Sport Science, Aarhus University, Aarhus, Denmark
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- Schröder, Henrik (författare)
- Institute of Pathology, University of Southern Denmark, Odense M, Denmark
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- Bangsbo, Jens (författare)
- Section of Human Physiology, Department of Exercise and Sport Sciences, University of Copenhagen, Copenhagen, Denmark
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- Örtenblad, Niels (författare)
- Univ So Denmark, Inst Sports Sci & Clin Biomech, DK-5230 Odense M, Denmark,NVC
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(creator_code:org_t)
- 2012-02-10
- 2012
- Engelska.
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Ingår i: European Journal of Applied Physiology. - : Springer Science and Business Media LLC. - 1439-6319 .- 1439-6327. ; 112:10, s. 3559-3567
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Whole muscle glycogen levels remain low for a prolonged period following a soccer match. The present study was conducted to investigate how this relates to glycogen content and particle size in distinct subcellular localizations. Seven high-level male soccer players had a vastus lateralis muscle biopsy collected immediately after and 24, 48, 72 and 120 h after a competitive soccer match. Transmission electron microscopy was used to estimate the subcellular distribution of glycogen and individual particle size. During the first day of recovery, glycogen content increased by ~60% in all subcellular localizations, but during the subsequent second day of recovery glycogen content located within the myofibrils (Intramyofibrillar glycogen, a minor deposition constituting 10–15% of total glycogen) did not increase further compared with an increase in subsarcolemmal glycogen (−7 vs. +25%, respectively, P = 0.047). Conversely, from the second to the fifth day of recovery, glycogen content increased (53%) within the myofibrils compared to no change in subsarcolemmal or intermyofibrillar glycogen (P < 0.005). Independent of location, increment in particle size preceded increment in number of particles. Intriguingly, average particle size decreased; however, in the period from 3 to 5 days after the match. These findings suggest that glycogen storage in skeletal muscle is influenced by subcellular localization-specific mechanisms, which account for an increase in number of glycogen particles located within the myofibrils in the period from 2 to 5 days after the soccer match.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Hälsovetenskap -- Idrottsvetenskap (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Health Sciences -- Sport and Fitness Sciences (hsv//eng)
Nyckelord
- Carbohydrate metabolism; Glycogen storage disease; Muscle contraction; Muscle fatigue; Physical exertion; Skeletal muscle fibres
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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