Apparatus for detecting movements of a person using the apparatus for the purpose of transforming the movements into a virtual space, comprising a seat (110; 210; 410), sensors which detect the movements of the feet of the person using the apparatus, and cyber foot covers (50a; 50b; 50c; 50d) for receiving at least one of the sensors. The seat (110; 210; 410) comprises a support member (103; 203) adapted in that a seat element (105; 205), on which the person using the apparatus can sit, is attachable to an upper portion of the support member (103; 203) and in that the load of the seat element (105; 205) is received substantially along a vertically arranged longitudinal axis of the support member (103; 203) and transferred downwards to a ground. The seat (110; 210; 410) is rotatably arranged relative to the ground and is shaped such that at least a movement of the legs from the knee to the distal end of the legs of the person using the apparatus is allowed. The cyber foot covers (50a; 50b; 50c; 50d) each have a sole (58; 71) and fastening means (61; 62; 74; 76) with which the cyber foot covers (50a; 50b; 50c) can be fastened to the legs of the person using the apparatus. The sole (58; 71) of the cyber foot covers (50a; 50b; 50c; 50d) is curved so as to allow a continuous sliding rolling movement of the feet of the person using the apparatus during movement of the legs of the person using the apparatus.