What is the difference between red and white muscle fibers?

Red muscle fibers are dark red muscle fibers associated with the presence of a red hemoprotein called myoglobin. Myoglobin binds and stores oxygen in the form of oxymyogibobin in red fibers. Oxymyoglobin releases oxygen for use during muscle contraction. Red muscle fibers have more mitochondria than white ones. They carry out significant aerobic oxidation without accumulating much lactic acid. In this way, red muscle fibers can contract for a long period of time without fatigue.
White muscle fibers are lighter in color because they lack myoglobin. They mainly rely on anaerobic oxidation (glycolysis) for energy and accumulate lactic acid in significant amounts during strenuous work and fatigue soon after.