Someone commented about running the same route. Here's a tip I learned from my sister who started having knee pain and went to a Dr. If you run the same route, be sure to alternate the course you take. To be more clear, if you run around a lake, run clockwise one day and then counterclockwise the next. The reason for this is that every road/path/trail/etc has a natural grade to it. If you constantly run in one direction you risk hurting one side of your body because the ground might be angled to your left or right, making your opposite knee travel a shorter distance thus creating a higher impact on that leg.
If you run on a street, just be sure to run on the opposite side every time you go. So run down the left side one day, then the right the other.
If you run on a street, just be sure to run on the opposite side every time you go. So run down the left side one day, then the right the other.