The hidden switch behind one of the biggest paradoxes in aging muscle
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."
We haven't written up this one. Medical Xpress has the full story — the link below goes straight to it.