petri, I hear you. Moved last summer. Did a bunch of smaller loads leading up to the big move. Had plenty of help for the big move, but then still had some smaller moves. The next day I couldn't get out of bed. And then had to start preparing the old place to sell. It is exhausting!!
My guess is it is similar to reinjuring an old injury. If you get hurt, let it heal, and then reinjure it later, the reinjury can be more painful than the original. I think of when I had a hernia repair. I could just imagine ripping my stitches by not following the restriction. I believe that would have hurt worst than the original hernia and surgery.
M(53), W(54),D(19) M-23, T-25 Bomb Drop - Dec.23, 2017 Ring and Piecing since March 2018