What you are holding in your hands is probably the best overview of activities in sports engineering available at the time of printing; i. e. the state of the art in summer 2006. It is the result of so many people's work to whom we are indebted that it is difficult to name them: there are the authors, the scientific advisory board, the scientific committee, the theme patrons, the publisher and printer, the advisors of whatever kind - and, here we have to make an exception, there is Ingo and Amanda. Nobody who has been part of the production of this book could have done without them, at the very least us: they handled issues you wouldn't even believe could tum up with efficiency and charm. Thanks, Ingo Valtingoier; thanks, Amanda Staley. In the accumulation of the contributions and the preparation of the proceedings we encountered one development that we were very happy about: the sports engineering community keeps growing - in the number or researchers and experts involved, but also in the breadth of disciplines and institutions contributing. This should definitely be interpreted as a positive development - even though in the evaluation of contributions this lead to a number of intricate discussions.