<!doctype html public «-//w3c//dtd html 4.0 transitional//en»> http-equiv=content-type> In order to design functional and safe prosthesis components, it is important to know how they are used by the amputees in their daily lives. The book describes the development of a mobile measurement system that allows the onsite collection of data about use and loads from transfemoral amputees, which will enable the realistic planning of design, function, and testing.