[mlhn]

I ran alot years back ago. Knee ache which made it impossible to run.

As you said, and what a nurse told me I needed stretching. That's helped against part of the ache, but for the running, I read the book born to run. They talk about using your calf muscle as a spring (sorry if this is the wrong words, I am not a native english speaker).

To do this you need to take short steps where you land your feet under you all the time so you don't put your heel in the ground. Very tough training to begin with, but it at least removed all my running problems.

Since I was a heelrunner I had to start over, since this is very tiring.