Here is the truth. Running is not bad for the knees. On the contrary, studies have shown that running helps in protecting the knees from long term degenerative conditions. The culprit is - improper running techniques, poor form. Increasing running load beyond what your body can handle. And, not including cross training activities such as strength & resistance training as part of your training regimen. When running is done thoughtfully through a structure that is built around your current fitness levels and goals, it is truly transforming.