Fast-Twitch Fibers

Fast-twitch fibers are a type of muscle fiber that contract quickly and generate powerful bursts of strength. They are designed for short, intense activities like sprinting or lifting heavy weights. These fibers use energy rapidly but tire quickly, making them less suited for endurance activities. Athletes often have a higher proportion of fast-twitch fibers in muscles that require explosive movements. In contrast to slow-twitch fibers, which are better for longer, steady activities, fast-twitch fibers allow for quick, forceful actions, playing a crucial role in sports and physical performance.