Very sore workout

I woke extremely sore this morning in the quads. It hurt to go down stairs - a LOT. However, I figured I'd go to the track and see how it would be to racewalk. I warmed up and did flexibility drills and it felt OK so I decided to do my workout. I did 8x422m in 2:25 (5K pace of 5:45/km) with 1 lap recovery. I did all of them in 2:22 or 2:23, except one at 2:24 and one at 2:25. The last was in 2:22 - so I still had some left! My legs were very tired at the end and of course they are still quite sore, but I am proud that I got out there and did it anyway.