Fiber
Medical term · F
A substance found in plant foods that the body can’t digest.
Related terms
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Fast-twitch fiberOne of two main types of skeletal muscle fibers. Fast-twitch fibers are recruited most heavily when bursts of power are needed, as in sprinting. See also slow-twitch fiber.
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RoughageIndigestible dietary fiber found in grains, fruits, vegetables, and other foods. Roughage is thought to help prevent conditions such as constipation.
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SarcolemmaA membrane that covers the muscle fiber and ties the end of it to a tendon.
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Slow-twitch fiberOne of two main types of skeletal muscle fibers. Slow-twitch fibers are recruited most heavily for endurance (aerobic) exercises. See also fast-twitch fiber.