What is: Slow Twitch Muscle

slow twitch muscles

A slow twitch muscle (Type I) is aerobic. That means it is more efficient at using oxygen to create more fuel (known as ATP) for long term muscle contractions over an extended period of time. They fire slower than fast twitch fibers and can last for a long period of time before they fatigue. Therefore, slow twitch muscles are the primary workers during long runs like marathons, long bike rides, and swimming.

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Adam is an athlete with a serious passion for fitness and health. He played basketball at University of Delaware and Stetson. His degree is in health science and he's a certified personal trainer who loves helping people reach their goals.