Wearable sensing technologies give the user the possibility of on-site and real-time measurements, analysis and feedback of movements and postures in everyday behaviour, learning and training situations. There are many established motion capturing technologies to support complex movements, but less mobile and wearable systems. One of the key disadvantages of the existing systems is their high complexity, for instance they demand high-speed cameras, multi-channel audio systems or the fixation to a special room or laboratory. As a low-cost and flexible solution, this paper presents an easily relocatable, flexible sensor-based system for motion capturing and multi-modal real-time feedback. Our system is easy to use, it even allows operation without an external computer. Here we introduce our wearable sensor-setup and outline its applications and benefits in typical everyday training situations in combination with multi-modal feedback and embedded systems including closed loop interactive sonification.