> best thing to do is start resistance training.

Doing so very carefully!

I will agree though. Before going on a long cross-state bike trip, I had some back issues and was cramming in work (too much sitting). I went out with lower back pain, resolved itself after a few days of riding for most of the day.

I very much agree that counter-intuitive behavior is often what is called for. The exercise or sedentary habits are habits. They really become normal one way or the other quite quickly.