I ached all over this morning. But I went to the 9:15 am spin class because I knew it would be good for me. The aching stopped about halfway through, but it's back now.
Fortunately this is just muscle soreness, which I don't mind at all. In fact, I see it as a good sign, that my combination of running/jogging yesterday morning and going to the Body Combat class in the evening have helped me get stronger.
It's not that I believe in that hokey old saying, "No pain, no gain." But I do believe that some (not all) pain is good, and that struggle is absolutely essential.
So I struggle on.