Not too long after I retired, I took up running. At first it was just for fun; a friend (that I used to meet up at the gym with) and I decided to train for and run a 5K just for something different to do. My goal was to run without stopping to walk, which I did. I thought I was just going to run the one race, but I became hooked and saw other women my age running impressive times. My competitive side took over and I started reading and learning how to really train to be competitive within my age group.
It's been about 14 years of running and racing now. Over the years I had a few minor running injuries, the type that typically just required some time off and maybe cutting back the mileage for a while. Over the past year and a half I've had nagging hip pain that I couldn't get past despite my best attempts and it seemed to get worse last fall. I finally went to see an orthopedic doc last month and was pretty surprised to learn that I have significant arthritis in that hip. He told me I could continue running, as long as I was not in a lot of pain, without risking damage to my hip.
I am still running but less miles. My enthusiasm to race is quickly waning. What I loved about racing was testing myself to see what I could do. I have no desire to watch myself deteriorate if I can't train properly. At this point I am hoping to be able to run with my DH a few days a week for another couple of years. I may run a couple of fun local 5Ks but probably not much more than that. I plan to eventually transition to walking - I've already replaced one or two runnings days a week with walking.
I guess what has surprised me the most is my acceptance of the whole situation. I don't really seem to mind that I won't be racing and that I will gradually move from running to walking. I have always found walking to be more sociable and "civilized" anyway.

I enjoy seeing what my neighbors are doing in their yards, stopping to chat, etc. Walking is more conducive to that anyway. I just hope that I continue to be able to walk without discomfort.