Välkkynen, PasiHeinilä, JuhaniLainio, SariLakaniemi, SamiVäätänen, AnttiB. Froehlich and J. Deisinger and H.-J. Bullinger2014-01-272014-01-27200132118367131727-530Xhttps://doi.org/10.2312/EGVE/EGVE01/229-235Virku (Virtual Fitness Centre) is a study, in which an exercise cycle is used for navigating in a virtual environment. The cycle acts as a haptic bodily user interface between the user and the simulation. The simulation takes the terrain of the virtual environment into account in order to provide better feedback of the environment for the user. We have found out in usability tests that this kind of interface enhances the user's feeling of immersion in the virtual environment.