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RM S1-1 Muscle Fibre Types K.2.S1.C.1b Type Slow-Twitch Muscle Fibre Fast-Twitch Muscle Fibre Fast-Twitch Muscle Fibre Type I Type IIA Type IIB (SO—slow oxidative) (FOG—fast oxidative glycolytic) (FG—fast glycolytic) Colour red pale red to white white Fatigue resistance high moderate low Myoglobin concentration high moderately high low low intermediate to high high Contractile speed slow fast very fast Aerobic capacity high moderate low Anaerobic capacity low high high Strength and power low motor unit strength; high motor unit strength; high motor unit strength; low power output high power output high power output long distance running/swimming/ cycling weight lifting short sprints; Characteristics (delivery of oxygen to the muscles) Glycolytic capacity (release of glycogen within the muscles) Most active during explosive jumping References: Temertzoglou, Ted, and Paul Challen. Exercise Science: An Introduction to Health and Physical Education. Toronto, ON: Thompson Educational Publishing, Inc., 2003. Wilmore, Jack H., and David L. Costill. Physiology of Sport and Exercise. 3rd ed. Windsor, ON: Human Kinetics, 2004.