What Is the Difference Between Fast-Twitch and Slow-Twitch Muscles?

Slow twitch muscles have the capacity to work for a long time while tiring slowly, so they are used in endurance activities such as walking and marathon running. Because these muscles use oxygen as fuel, they are red in color. Fast twitch muscles tire quickly because they consume energy at a high rate and make sprinting, jumping and other explosive movements possible. These muscles are anaerobic and are lighter in color.