of the Swiss ball; however, she did not limit herself to a technical description. Instead she set out to discover the underlying physiological mechanisms and has succeeded in showing how a knowledgable physiotherapist can contribute to the development of physiotherapy as a science. Though based on the concept of S. Klein-Vogelbach, Beate Carriere has added so many of her own exercises, descriptions, and explanations that we are justified in speaking about the Carriere concept of using the Swiss ball. What I appreciate in particular is her critical view and attempt to see the patient and his problems from all possible aspects. Therefore, she does not consider the Swiss ball program the one and only means of treat­ ment but incorporates other approaches as well.