The Slow Oxidative Fibers. Skeletal muscles consist of two different muscle fiber types. Slow-twitch Type I Muscle Fibers.
Based on metabolic pathways utilized muscle fibers are categorized as slow oxidative SO fast oxidative FO and fast glycolytic FG. Found in large numbers in postural muscles. Slow oxidative also called slow twitch or fatigue resistant fibers.
Split ATP at a slow rate.
Slow oxidative fibers have structural elements that maximize their ability to generate ATP through aerobic metabolism. The resistance to fatigue demonstrated by these muscles is aided by other characteristics of slow-twitch type I fibers that endow them with a high oxidative capacity for aerobic respiration. SO fibers use aerobic metabolism to produce low power contractions over long periods and are slow to fatigue. A presentation by a group of E112L Students of UC Irvine on the two major types of muscles and their differences.