When Elizabeth was born, I set December 1 as my "First Run" day, and I managed to pull it off. After I did carpool duties, I left Campbell and Elizabeth with B and headed out for a short run. It wasn't pretty or fast, but I managed to run/walk, with more running than walking, for a mile and half. I even managed to do strides at the end.
I'm a long way from being in shape, but I have to start somewhere. At least I didn't fall flat on my face like I did on my first run after having Campbell.