Another 4 Miler, but no PR

I had the opportunity to set a Personal Record for the 5th consecutive time on 4 mile runs, but it didn't happen. I did, however, make it my 5th best time out of all my 4-milers. My total time was 33:42, a pace of 8:26. I still haven't replaced the battery in the heart rate monitor. From time to time after the run, I felt a burning sensation in my right knee (the area in which I had ITB problems before).