Slow-twitch muscle fibers have a high resistance to fatigue. True or false?

Answer

True.

Explanation

Slow-twitch muscle fibers, also known as Type I fibers, are specifically designed for endurance and prolonged activities. These fibers have a high density of mitochondria, which are the powerhouses of the cell, enabling them to use oxygen efficiently to produce energy. This capability allows slow-twitch fibers to sustain activity over longer periods of time without becoming fatigued. Consequently, they are predominantly utilized during low-intensity, endurance-based activities, such as long-distance running or cycling.

In contrast, fast-twitch muscle fibers (Type II fibers) are geared more towards short bursts of strength and speed but are more susceptible to fatigue. This difference in functionality is crucial for athletes who need to optimize their training for specific types of events. In summary, slow-twitch muscle fibers indeed have a high resistance to fatigue, making the statement true.