Why a red muscle fibre can work for a prolonged period, while a white muscle fiber suffers from fatigue soon?
Red muscle fibres contain myoglobin that stores oxygen in the form of oxymyoglobin. Since, there is a continuous supply of oxygen; for the oxidation of food materials to release energy, the red muscle fibers retain energy and do not become fatigued and work for long periods whereas white muscle fibres lack myoglobin. At times they carry out anaerobic respiration and become fatigued.
