Video - Slow twitch and fast twitch muscle fibers

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Video Summary
Slow twitch fibers, also known as "red fibers," are characterized by a high endurance capacity and a slow contraction speed. They contain more mitochondria and blood vessels, allowing them to use oxygen efficiently for energy production. Slow twitch fibers are used for activities that require sustained effort, such as long-distance running or cycling. They use oxidative phosphorylation for obtaining ATP.
On the flip side, fast-twitch fibers have a high power output and tire quickly. They contain fewer mitochondria and blood vessels and rely on stored glycogen as a fuel source. They are used for short, intense activities such as weightlifting or sprinting. They use anaerobic glycolysis for obtaining ATP.