I did not train on Friday, Saturday, or Sunday. Why? I tweaked my back Friday while STANDING UP. ???????? My muscles went into immediate spasms and have been a knotted mess all weekend. Actually, I feel pretty good now. (It's 9:40 pm Sunday.) I can run up and down the stairs. It's the sitting down and standing up that are the problem.
I'll probably hold off with heavy training until Tuesday. I refuse to be set back. I'm making fantastic gains. My goals await me!