Muscle glycogen and cell function – Location, location, location

Glycogen is localized in distinct pools within skeletal muscle fibers, which may be linked to muscle function.

• Glycogen distribution in skeletal muscle varies with exercise intensity, fiber type, training status, and immobilization.
• Reduced levels of glycogen in these pools are associated with decreased calcium release, slower muscle relaxation, and lower membrane excitability.
• Understanding glycogen's subcellular localization is crucial for comprehending its role in muscle metabolism and signaling.
• Low muscle glycogen levels may affect the coupling of electrical signals to muscle contraction, connecting energy state to energy use.

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