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

Glycogen content in muscle increased by approximately 60% within the first day after a soccer match.

• Glycogen levels remained low for an extended period following a competitive soccer match.
• In the first day of recovery, glycogen increased in all subcellular localizations, but not uniformly over time.
• Myofibrillar glycogen, which makes up 10-15% of total glycogen, showed no further increase after the first day.
• From the second to the fifth day of recovery, myofibrillar glycogen increased by 53%, while subsarcolemmal and intermyofibrillar glycogen levels remained unchanged.
• An increase in particle size occurred before an increase in the number of glycogen particles across all locations.
• Average particle size decreased from three to five days post-match, indicating complex storage dynamics.

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