I've just joined this forum. I started running with Couch to 5k in January (aged 67) and completed it in March. I continued consolidating my runs but then was struck down with tendinitis in my knees - ouch! Had to stop running for a while whilst I had treatment for that. During that time I had a flare up of arthritis in my neck, which was excruciatingly painful. To cut a long story short, I've had to give up running completely for a while.
So, my new regime is to do a brisk 5k walk every other day. I've also bought a turbo-trainer for my bike (turns it into a static exercise bike). On the days in between walks, I'm cycling for 20 minutes. Then on the 7th day, I go to a jive dance class. I also do stretching and neck exercises first thing every morning.
I don't especially want to lose weight, although I am a bit podgy round the middle, but I do need to tone up and get all my joints moving freely again.
So, that's my challenge for the next 6 weeks and I hope to be able to start running again after that. Time will tell!