Slow-twitch muscle fibers

Slow-twitch muscle fibers are a type of muscle cell designed for endurance and sustained activity. They generate energy efficiently through oxygen use, allowing them to perform prolonged movements like marathon running or maintaining posture without fatigue. These fibers contract more slowly and generate less force compared to fast-twitch fibers, but they are highly resistant to fatigue, making them ideal for endurance tasks. Their rich blood supply and high number of mitochondria help sustain activity over long periods. Overall, slow-twitch fibers are essential for activities requiring steady, sustained effort over time.