I think that standing still is much harder on my lower back than walking. I really over-did it a few weeks ago on a weekend away and I paid for it for over a week. When I really noticed it the most that weekend was after our tour of a mansion where there was lots of standing around listening to the guide. The whole thing lasted about 45 minutes, and afterwards I was really sore.
I've noticed that this got worse over the years. I always knew I didn't like to stand still in one spot, but never really linked it to my scoliosis. I now think it is.
I agree with Jimbo, that you should probably start being monitored the the right kind of orthopedic doctor.
Debbe - 50 yrs old
Milwalkee Brace 1976 - 79
Told by Dr. my curve would never progress
Surgery 10/15/08 in NYC by Dr. Michael Neuwirth
Pre-Surgury Thorasic: 66 degrees
Pre-Surgery Lumbar: 66 degrees
Post-Surgery Thorasic: 34 degrees
Post-Surgery Lumbar: 22 degrees