I'm planning on starting either C25K or just jogging as long as I can, walk to recover, then repeat. My jog is initially going to be verrrrry slow. I'm guessing no faster than 3.5 on the treadmill Eventually I will be going to a runners store and getting fitted for shoes, but I'm hoping to put that off for a little while and just use my regular workout shoes, which fit me well and are supportive. I have a history of knee problems, so I don't want to invest a lot in running shoes only to find I can't even run because of my knees.
Am I asking for trouble putting off the spendy running shoes for a while until I make sure my knees will hold up?