Which muscle fibers have the greatest capacity to produce energy via the anaerobic energy system?

Fast twitch muscle fiber

Fast twitch muscle fiber is known to be most powerful and lowest in endurance and usually activated when the body is near maximum exertion. They are identified by a quick contraction time and usually low resistance to fatigue but are used in powerful bursts of movements like sprinting. however, muscle fibers have the greatest capacity to produce energy via the anaerobic energy system.