Understanding the Differences Between Fast and Slow Twitch Muscle Fibers

Muscle fibers come in different types, with fast and slow twitch fibers being the main ones. Most people have a relatively even distribution of these fibers in their bodies. Genetics can play a role in determining fiber composition, but it is not a sole determinant of athletic performance. Different muscles within individuals also have varying compositions. Athletes with a higher proportion of slow twitch fibers tend to excel in endurance sports, while those with more fast twitch fibers are drawn to sprinting. Polarized training is recommended for both beginners and veterans to improve speed and performance.