The hidden switch behind one of the biggest paradoxes in aging muscle

Medical Xpress - latest medical and health news stories ·
Health & Medicine United Kingdom

Our muscles are built from bundles of fibers. Some are fast-twitch, tuned for quick, powerful bursts of effort but quick to tire. Others are slow-twitch, built for endurance and packed with more mitochondria, the structures commonly called the "powerhouses of the cell."

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