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What is the difference between fast-twitch and slow-twitch muscle fibers?
Wiki User
∙ 14y ago
ofcourse not; slow twitch muscle fibers are: * smaller in diameter * red in color * depend on oxidative phosphorylation for their ATP supply * are highly vascularized (better blood supply) * have more mitochondria * more myoglobin fast twitch muscle fibers * larger * white * glycolysis is the source of ATP * less vascularized * less mitochondria * less myoglobin
Wiki User
∙ 15y ago
Wiki User
∙ 14y agoFast-twitch fibers can deliver a quick burst of power. Slow-twitch fibers can maintain a contraction for a longer time.
Because of the higher energy demands of slow-twitch fibres (due to their more frequent and prolonged usage) they have a higher density of mitochondria for energy and myoglobin to provide oxygen. Meanwhile, fast-twitch fibres tend to have larger stores of glycogen so that vast quantities of energy can be provided at short notice.
Wiki User
∙ 13y agotechnically muscle fibres are classified as red or white but they are the same thing
Wiki User
∙ 12y agono, fast twitch fibers generate more force.
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