Hydrotherapy simply means therapy given in a pool or tub. Though it is a hassle to change into a swim suit and get wet, the benefits of this type of therapy are worth it.
Rehabilitation is quicker.
The therapy sessions are more fun and weight bearing activities can be started much faster with the buoyancy of the water. Water is heavier than air. The pressure that water exerts on the submerged parts of our bodies forces swelling to diminish and thereby allows for greater joint movement and less pain. The natural resistance that water has to displacement will force us to exert more force on our joints to move. This resistance adds to the level of conditioning that is attainable in water as compared to air.