My posture affects my pain. It's somehow the very basis of how I use my body... my physical "setpoint" in a way. A good posture improves circulation and decreases stress on muscles, tendons and discs, thereby preventing muscloskeletal pain and stimulating overall health.
I have average-to-alright posture I guess, but I have a tendency to slump my neck and shoulders, and a tendency to favor my right side. The slumping neck and shoulders really provokes the neck pain from my whiplash injury, this is something I know, yet keep forgetting... It can set off really bad migraines, but if I just remember to straighten my neck and tuck in my chin, many of those can be avoided.
When I continually favor my right side, I place extra strain on my lumbar spine, by building unbalanced musculature there.
I don't really know if I'll be able to do anything about this in just a week, I guess I have to start with building awareness, and maybe having a signal that reminds me to check and correct my posture every hour or so? When I get into it I may be able to start doing some balance training that promotes good posture, but as a beginning I think I'm just going to challenge myself to improve my posture as much as possible as often as possible this week.
... And I'll let you know how it goes...