Swimming Rehab

Rehab Your Back Injury With Swimming, Not Surgery
by Hannah Caldas
As a swimmer I am biased when I say there is very little for which swimming isn’t beneficial. But even thinking objectively it is a fairly accurate statement. I recently covered the benefits of swimming as a recovery strategy between workouts for other sports, backed by peer-reviewed studies. Another area for which swimming is particularly useful is in the rehabilitation of injuries. I am using the word “injuries” here in a very broad sense.
http://breakingmuscle.com/swimming/rehab-your-back-injury-with-swimming-not-surgery

There are a few main reasons why swimming is a good rehabilitation tool:

It is low impact. (Unless you are training to be an elite swimmer at which point you will be putting your body through a more intense, higher impact workout.)
It is a form of active stretching - swimming technically will ensure full range of motion movements for many different body parts.
It provides just enough resistance from water to provide, over time, sustained aerobic conditioning to the rehabilitating subject, allowing them to continue to workout while rehabbing at the same time.