I have (as you may recall) been having issues with a tendon behind my right knee. Well today, I decided that it had improved enough for me to go for a run. I was sore at first, but by the end of my 4.2k, it didn't hurt at all. Couple that to a new route that worked and I had a great run (despite the fact it was dark at 5:30pm). I'm feeling happy and more relaxed than I was before going out. Hurrah!