The present application relates to a fitness apparatus having a housing on which are arranged a first supporting element and also a second supporting element. The first and the second supporting elements can be moved linearly in each case in two spatial dimensions located at right angles to one another. The housing has at least one active element, by means of which a movement of the first supporting element or of the second supporting element out of a respective starting position is counteracted by a force. The housing also has at least one coupling element, which couples the linear movement of the first supporting element in a first direction of a first of the two spatial dimensions to a linear movement of the second supporting element in the second direction, which opposes the first direction in this first of the two spatial dimensions.