What do you all think about using an elliptical machine as a replacement for running? I am still having some knee pain when I run.

I had a meniscus clean-up in November, and it's a lot better, but not ready for real running still - that's the main reason I'm interested in the Chi running seminar.

If I were to use a basic training plan posted below, would I need to increase the time, or keep it the same?

Or, am I just kidding myself?