Which type of muscle fibers have less endurance?

Fast-twitch muscle fibers are known for their quick, explosive power and strength, which makes them crucial for activities that require short bursts of intense effort, such as sprinting or weightlifting. However, their capacity for sustained activity and endurance is limited. These fibers rely primarily on anaerobic metabolism to produce energy, which allows them to perform well in the short term, but they fatigue more rapidly compared to slow-twitch fibers.

In contrast, slow-twitch muscle fibers are designed for endurance activities. They are more efficient at using oxygen to generate ATP, making them ideal for prolonged exercise, which explains why they are dominant in endurance athletes like long-distance runners. Hybrid muscle fibers, while they have characteristics of both fast and slow-twitch fibers, do not necessarily have the same level of endurance as slow-twitch fibers.

Thus, due to the biochemical properties and functionality of fast-twitch fibers, they inherently possess less endurance compared to their slow-twitch counterparts.