In October 2012, I PR'd a half marathon. Felt great.
Today, I ran 2 miles on the treadmill. Felt like shit.
PS. Do NOT wear men's running tights. They seem like they fit until you start running...then you realize you are missing the equipment that keeps them from chaffing.
Today's run: 2 miles (no intervals) 24 minutes. Plus 16 minutes of warm-up and cool-down walking. 40 minutes to add to my fitness challenge.