I am mostly a weekend warrior when it comes to working out but If Doctors swear by exercising and doing proper stretches everyday then i am going to take them at face value.

I do my breathing and basic stretching exercising multiple times throughout the day. Even when you are sitting at your desk at work or just driving you can accomplish these. I made walking with my family a hobby. It keeps them and me healthy and loose. It's a low impact exercise so it's good for RA and AS folks. Swimming is better but it requires me to go to the gym frown