Exercising in warm water was extremely helpful for me. I bought a house with a heated pool and put the temp up to over 100 degrees.

I could not bear any weight when I started walking in the hot pool for hours at a time. Eventually( a few months later) I could bear weight on the ground and began to be able to walk again withouth crutches. Without the help of the pool and hot water, I don't think I would have gotten rid of the crutches.
The hot water would ease my pain and make it bearable to walk.

I had previously tried Aquatherapy with a physical therapist but found that I would be worse after the therapy. The exercises they had me doing did not help but hurt my situation.

So, in summary, I have had very good and also very bad experiences with water therapy. doing it myself, in my own back yard seem to work great, but under the care of a therapist - I did not improve but got worse.

That's my 2 cents,
Peace and hope,
Lisa