The gentle, therapeutic style of water running is perfect for those who are going through physical therapy; it keeps the body active in a safe and easy environment.  When shoulder deep in water, it is estimated that an individual only needs to support around 10% of their body weight. This means that exercise can be performed without causing further pain or damage to an injury and preventing new injuries from occurring. The increased blood flow will bring oxygen and nutrients to damaged tissues and cells, and can also help to reduce swelling. More nutrients in the blood leads to faster healing, and the water can be warm or cool, depending on whether you are dealing with swelling or inflammation.