Abstract: Apparatus for use in hydro-therapy comprises a pair of parallel rods 2 extending between rigid flotation bodies 4. Each rod 2 is formed at each end with a vertical extension 6 passing through a slot 8 in the respective body 4. Each extension 6 is screw threaded and carries clamping nuts 12 and 14 respectively above and below the upper and lower surfaces of the body 4. Adjustment of the spacing between the rods 2 is obtained by relative movement of the extensions 6 along the slots 8 and vertical adjustment of the rods 2 is obtained by nuts 12 and 14.