In this paper, results of dynamic testing of the fitness hall floor are presented. The vibration and frequency response was measured for pre-cast concrete floor located in the office building. Complains of the office workers of excessive vibration resulting from fitness activities in the gym hall motivated this study. Two sources of vibrations – rhythmic activities and individual weightlifting activities - were analysed. Spectrum analysis of concrete floor revealed the natural frequency of the floor being 36-38 Hz, which allows the floor to be classified as high frequency floor. Attenuation of floor vibration after the impact was analysed. Vibration of the floor was confirmed to be a perception issue, not a structural one, and human perception of tolerable vibration is briefly discussed.