What is characteristic of slow twitch (type 1) muscle fibers?

Slow twitch (type 1) muscle fibers are characterized by their high capacity for endurance. This type of muscle fiber is designed for prolonged, low-intensity activities, such as long-distance running or cycling. They contain a higher number of mitochondria and myoglobin, which enhances their ability to use oxygen efficiently for aerobic metabolism. This makes them particularly well-suited for endurance activities, as they can sustain muscle contractions over longer periods without fatiguing quickly.

In contrast, fast twitch fibers (type 2) are better suited for short bursts of power and speed but tire out more quickly, making them less effective for endurance activities. The characteristics of slow twitch fibers allow athletes who rely primarily on aerobic activities to perform reliably over extended periods, contributing to overall endurance and stamina.