The FIrst Setback

Went up to the treadmill today, the stiffness never left, in fact on the left side it got worse as time went on. I managed 20 minutes at a very low intensity, 6/10 of a mile only. I didn't think it prudent to press the issue when it never seemed to let up. So, we'll call today a wash, almost a day off, then again, I did manage 20 minutes, I guess I can look at that in a positive sense?