Reynolds Number is a fundamental parameter in defining vortex shedding from circular cylinders. Most studies of vortex-induced vibrations focus on moderate Reynolds Number values, without analysing how the parameteraffects these oscillations. An experimental set-up was developed in the large test section to study vortex-induced vibrations at high Reynolds Numbers up to Re=6∙105. The setup allows for the simultaneous measurement of both the instantaneous fluid force, calculated by integrating surface pressure distribution, and the model oscillations measured by accelerometers. Additionally, pressure distribution measurements were performed on a fixed cylinder at different sections.