I have to add that walking.....regular, consistent movement of any kind....is one of the best things you can do. For me, it's walking my dog. It's all about the distance, not the speed.
Until he retired a year or so ago, I was fortunate to have one of the greatest rheumatologists in the US. There will never be another Dr. William Shiel [founder of MedicineNet.com]. One day I walked into his office and I was stressed with everyone's problems. He sat me down and told me to forget all that. When I was in his office it was all about ME. Wow. Who would have thought my small problems were important to someone. With that he suggested a psychotherapist.
Talk therapy - great stuff. So I booked an appointment. She was instrumental in making me realize that it's all about living MY life and not worrying about living up to the expectations of others. My problems, small as they may be to those of others, are real problems and deserve consideration, too. It's ok for me to say NO. It's ok for me NOT to have to explain over and over again to someone why I can't participate in an activity. And that it's ok to go into the coat closet and do a little primal therapy. I'm all the better for her.
So get out and walk and get those endorphins moving!