Exercise: everything counts

I walked five miles yesterday. It was not even hard. After two weeks of very little exercise, I went walking yesterday. I felt good. After that I did some leg exercises, arm exercises. I did not follow any strategy or routine. What I wanted to do was just exercise, to see how I felt. And the weird thing was that I did not wake up sore or tired. Actually, it was the first time in two weeks that I did not wake up with back pain. It was a glorious morning.
So what is the message I want you to get from this? Do whatever you can, whenever you can. Don't go to sleep without doing something. Even if all you do today is twenty sit-ups or twenty push-ups. It is more than what you did yesterday. Add a 1/2 mile walk tomorrow. Spend twenty minutes on the stationary bike. Do something and keep trying.