A mounting structure is disclosed for providing support to a user. The disclosed structure can operate a braking mechanism through receipt of an input from a user. The braking mechanism functions to cause the Mounting structure to resist translational movement relative to a support surface, such as the floor of a building. A vertical displacement of an input surface may alter the coefficient of friction between the support surface and the Mounting structure. Such a mounting structure can be employed to assist a user in maintaining their balance.