I find getting up every couple of hours and stretching out for about 5-10 minutes helps (also gives me a chance for a smoke break
) - staying in the same position for long durations can really aggrevate back pain.
Of course, Ron makes a good point, women with large breasts are more likely to have back pain from the weight at the front there.
You may find a chiropractor helps you FB, they've worked wonders for me when I've used them.
