Nice job on your run. I did weights this morning, but yesterday I tried something a little different on the treadmill and it was a nice change. I walked for four minutes, then I jogged for 1, then I walked another three minutes and jogged for 1, I did that a couple more times until I hit the 21 minute mark.
Keep up the running. I was walking for a minute after my sprints today. I don't do weights work as it would mean going to a gym.
That's why I like my total gym. It fits nicely next to the treadmill and it's all pretty self contained.