I've discussed in the past that I injured my right leg last November. The knee was swollen, and it hurt to bend my leg. After the injury, I reduced my running but did continue to run because the running didn't increase the pain. In fact, I had no pain during my runs or afterwords, just when I would bend my leg by sitting in a chair or kneeling on the floor.
The current swelling in my knee is gone, and my leg feels fine when I don't run. However, during the past few weeks, I've increased my running from 15 miles per week to 26 miles per week, the long run going from 5 miles to 10 miles. I've noticed that during my longer runs my right leg is starting to hurt while I run, and my leg is sore for about 24-48 hours after the run.
One problem that I've had as long as I can remember, I was probably born with it, is that when I sit down my muscles become stiff, and it takes about a minute of walking for the muscles to relax. During that minute, my right leg is sore, more now than a few weeks ago due to my running longer distances, and the leg feels fine after the muscles loosen up. Fine, that is, until I do another long run. As I mentioned above, the leg is sore during that run but feels fine after a day or two of rest.
I now realize that my leg is suffering from the longer distance that I've been doing during the past month, and I've decided to reduce my distance and run a shorter distance for a few weeks to let my leg heal. I thus didn't run today to give my leg some rest. I did walk about 1 1/4 mile round-trip to a church meeting, and my leg felt fine. During the coming week, I will try 5, 6, 7 miles for my three runs. If my leg is still sore during or after the longer runs, I'll go back to the 5, 5, 5 miles that I ran after the accident.