It's taken awhile, but now I'm up to running 2 miles each morning, then doing crunches and push ups when I get home. I may never run the marathon I'm aiming for (might have to walk a lot of it), but geez, feeling this good physically is great.
I remember reading an article about Herschel Walker (if anyone remembers him). He never touched a weight in his college or NFL/USFL career. Yet he was buffed. Said he just did a bazillion situps and pushups everyday. Now, I'm not blessed genetically like he was, but it's amazing what two simple exercise will do for you.