Abstract: Apparatus for supporting a user in a pool of water for therapeutic or training purposes. An overhead unit having tracks which guide and support the wheels of a movable trolley is provided. A cable having one end attached to the trolley and one end connected to a support jacket worn by the user allows the user to be fully supported in the water. The user may move through the water along the line of the overhead rail. A brake is provided which can create a drag requiring an increase it the force needed to move the trolley along the rail thereby making the user work harder. The rail may be supported by attachment to a ceiling above the pool or supported by stanchions adjacent to the sides of the pool if portability of the apparatus is desired.