THU walk FM and back 2+mi

Walked to store and back. Knees very sore, so are ankles. My left knee is popping a bit. I don't remember at what point I started having knee problems the first time I started to get into shape - you know, the time that worked - but I will keep track of it. I will probably not start the 4 min run/1 min walk yet. I want to make sure I stay healthy.