Swimming is helpful because the water supports your weight by not putting too much strain on your muscles, hence, helping mobility. Swimming stretches and strengthens the muscles and improves cardiovascular fitness. An added plus is warm water relaxes the muscles and eases pain and stiffness. While you are swimming, you must concentrate on your breathing, rhythm and stroke. This takes you mind off your worries and pain. You are totally immersed in the moment! If you're lucky enough to live by the beach, you'll get the added benefits of swimming 'green'. All those beautiful lowly waves, rolling and and massaging every stroke.
I know it isn't easy getting off that chair when you're in pain, but you must! Just get up and move! That is of course on the days your pain is under a level six. When you move, your mind shifts. The pain becomes weaker, and all of a sudden you are at one with the activity and pain is but a small impression for the moment.