I am also on remicade and its amazing. Im into fitness Almost on a crazy level but my body tells me when enough is enough. I do cardio, pilates then weight train. I never push myself with weights like jroc said go light and do more. Just listen to your body and dont do more than you can. I flare when i over do it even on remicade.
When you live with chronic pain, you never tell the truth. When someone asks you how you are or how you feel, you lie & say, I'm fine or I'm OK, & you smile.