Which type of muscle fiber is known for its high endurance and low fatigue?

Slow twitch fibers are characterized by their high endurance and resistance to fatigue. These muscle fibers are designed for prolonged, steady activities such as distance running, cycling, and other endurance sports. They derive energy primarily from aerobic metabolism, which allows them to sustain activity over longer periods without tiring quickly. The high density of mitochondria, myoglobin, and capillaries in slow twitch fibers supports efficient oxygen utilization, further enhancing their endurance capabilities.

In contrast, fast twitch fibers are more geared towards short bursts of strength and speed, making them less suitable for endurance activities. Intermediate twitch fibers can exhibit properties of both slow and fast twitch fibers but do not excel specifically in endurance. Volitional fibers is not a recognized term within muscle physiology, making it less relevant in this context.