My wife and I were out this morning about 10 am. The temperature was 41 (F) when we left home We each did 2 miles, her walking, and me jogging/walking. My knee felt tight when I did my stretches before we left home, but it felt fine during my jog/walk. The temperature was 55 when we returned home. Quite a few runners and a skater or two were on the trail but not many cyclists. If my right quad continues to feel fine, I'll do 2.25 miles or so next week.