| Well first, welcome! And secondly, congratulations on your weight loss so far and taking the initiative to make it more permanent.
Sore knees after running have so many possible reasons:
1. You're not warming up before you run.
2. You have inadequate shoes.
3. You should alternate what side of the road you run on, since the roads tend to have a "crown", so if you always run facing traffic, one of your legs must compensate on every step since it has a bit further to make the strike. (often stated as your body thinks one leg is shorter than the other).
4. You're trying to do too much too soon.
Oh there are a bunch of reasons!! So if you want the 10 cent diagnosis, here goes:
Warmup with some stretching and walking. Start jogging slowly and then pick up the pace. Alternate walking with jogging for the first few weeks (jog 400 yards, walk 400 yards).
Invest in some good shoes. These will probably run you no less than $50USD and closer to $100USD.
Good luck, and hang in there! This is definitely doable!  | 
