Welcome Vanessa,
Congrarulations on your successes so far !!! May I suggest an eliptical as well, as an alternative to the running. After several knee surgeries I find the pounding of road work to be too much. I did a lot of research and found that you can get good resistance and cardio with the same height and direction changes as a treadmill. The beauty of the eliptical is that there is NO shock on any joint. It takes a while, because each manufacturers set up is a little different. Once you find one with the right width between the footpads and the propper stride length you'll be off in high gear in no time....
