Skeletal muscle glycogen content and particle size of distinct subcellular localizations in the recovery period after a high-level soccer match

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningfagfællebedømt

  • Joachim Nielsen
  • Peter Krustrup
  • Nybo, Lars
  • Thomas G P Gunnarsson
  • Klavs Madsen
  • Henrik Daa Schrøder
  • Bangsbo, Jens
  • Niels Ørtenblad
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 
TidsskriftEuropean Journal of Applied Physiology
Udgave nummer10
Sider (fra-til)3559-3567
Antal sider9
StatusUdgivet - 2012

Bibliografisk note

CURIS 2012 5200 019

ID: 37586571