How do I get my Sunday's back?

I looked out the window on Sunday and saw that the MS 5K was on.  I had run this race a few years ago with Lisa and Ian.  http://www.iwantcandy88.com/2015/05/ms-5k.html

It made me wonder what happened to my Sunday 5ks?
Or my Sunday triathalons?
Or my Sunday exercise in general??????

So, I am putting together an exercise plan for arthritis.  It sounds like walking plus icing and my medication is a good way to start.  My goal is 2km min a day.