Fig. 5. Representative fast muscle strain and EMG traces from three points along the body axis during sprinting at approximately 12Hz. Measurements were taken at 0.35, 0.5 and 0.65FL, where FL is fork length, from the snout in the superficial anterior-pointing cones of the myotome. Strain is expressed as the percentage length change ±l₀, where l₀ is muscle resting length.