This paper presents a project in the art-science nexus. SoundRunner is a platform that exploits the potential of electroacoustic music to create an interactive sound- and music-making experience. The project investigates how data on running performance can be harnessed in real time to drive musical creation. A range of psychological indices (and associated analyses) is used to assess the effects of the SoundRunner platform on runners. Driven by health and well-being imperatives, the project served to augment running experience with unique sound and music. The paper discusses implications regarding running performance and the further technological development of SoundRunner.