Did a short four mile run along Lake Michigan. It was near freezing, and I haven't ran in six months. While it felt good to get some exercise I immediately knew I was going to pay for my effort tomorrow. Luckily it's Christmas, and I'll be relaxing by the fireside, opening and giving presents.
My run opened my eyes to some potential cross-training. My quads were sore afterwards, so there's definitely room for improvement. Not sure how much can be gained from running, but I suspect my sprinting could benefit.