
Sprinting biomechanics of a double transtibial amputee using dedicated prostheses is compared with sprinting biomechanics of able bodied controls of the same calibre of 400m performance. Ground reaction forces and impulses, net joint moments of ankle, knee and hip joint, and mechanical joint power of the prosthesis and the sound ankle joint are different. The carbon blade used by the double transtibial amputee has a significant advantage in energy storage and return in relation to the healthy human ankle joint in fast sprinting at constant speed. Sprinting with prostheses provides a different kind of locomotion allowing the fast running at lower metabolic cost. © 2008 John Wiley and Sons Asia Pte Ltd