I think exercise is really important, too, but I haven't tried to take it to my max for quite awhile, either. I use a stationary exercise bike, walk, or do yoga. I belong to a gym but had the membership frozen for a couple of months because it's been hard to push myself to do the elliptical, etc. But if I start feeling well enough, I'll get back to it.
Just my own take, but I think it's important to let your body know you love it and exercise is one way you can get that across.
Potato... Female, 58, dx mild left sided ulcerative colitis 11/07
asacol 3 3x a day
am & pm
culturelle, benefiber wafers
children's vitamin, Vitamin E 400 mg
omeprazole 2x a day
oxazepam when needed, lomotil or ImodiumAD (but not in the same day)