Brodbeck, DominiqueDegen, MarkusStanimirov, MichaelKool, JanScheermesser, MandyOesch, PeterNeuhaus, CorneliaFred, AnaFilipe, JoaquimGamboa, Hugo2024-09-262024-09-2620101865-09291865-093710.1007/978-3-642-11721-3_30https://irf.fhnw.ch/handle/11654/47358Low back pain is an important problem in industrialized countries. Two key factors limit the effectiveness of physiotherapy: low compliance of patients with repetitive movement exercises, and inadequate awareness of patients of their own posture. The Backtrainer system addresses these problems by real-time monitoring of the spine position, by providing a framework for most common physiotherapy exercises for the low back, and by providing feedback to patients in a motivating way. A minimal sensor configuration was identified as two inertial sensors that measure the orientation of the lower back at two points with three degrees of freedom. The software was designed as a flexible platform to experiment with different hardware, and with various feedback modalities. Basic exercises for two types of movements are provided: mobilizing and stabilizing. We developed visual feedback - abstract as well as in the form of a virtual reality game - and complemented the on-screen graphics with an ambient feedback device. The system was evaluated during five weeks in a rehabilitation clinic with 26 patients and 15 physiotherapists. Subjective satisfaction of subjects was good, and we interpret the results as encouraging indication for the adoption of such a therapy support system by both patients and therapists.en600 - Technik, Medizin, angewandte Wissenschaften04B - Beitrag Konferenzschrift381–393