[mpol]

Not a direct answer to your question, but I see many people running past my house and balkony, since there is a nice walkway next to my house. I see them do it in many different ways, some of which are good, some of which are really bad.

Many people seem to bounce up and down on every step, putting shocks of weight on their knees at every step. That will hurt you in the long term, probably even in the short term. You should have a certain flow in running, where your upper body just remains at the same height, and your legs are the only moving parts. Like your upper body is just sliding forward, that is the effect you want.

And you might think you do it right, but chances are you don't. I do not run myself, but I can imagine there are running trainers who specialize in ergonomics and health. You might want to have someone like that take a look at how you are running.