A system and method for generating feedback on exercise technique. The system comprises a sensor and readout device to generate sensor data based on the exercise technique, e.g. pressure signal exerted by a foot. A data processor processes the sensor data to calculate a feedback value. A color mapper maps the feedback value onto a color map to transform the feedback value into a color value. A wearable feedback device comprising a light source generates a variable color light output based on the color value. For example, a mode selector provides selection between a plurality of feedback modes, wherein the selection of a feedback mode result in selection of a feedback algorithm for the data processor and selection of a color map for the color mapper.