its so great that youre giving it this much consideration, that in itself.. another step up for ya. i excessivly exercise. much less now than say a year or so ago but its just as addicting for me as the binge/purge/restriction cycle im on. its all one big fat %#@&#! addiction! i used to exercise up to 8 hours a day. im a mom and spongebob was raising my beautiful little girl. this is when purging came into play (slightly less time consuming) i dont know if ill ever be able to forgive myself for spending all those hours obsessing instead of being the good mom i so desperatly want to be but im sure gonna try. my suggestion would be to start slowly. i mean exercise is a healthy thing if done in moderation right? maybe before ya hit the gym try just going for short brisk walks or maybe an aerobic dvd in your living room or something. i wouldnt hop right into the gym scene if youre concerned. as my therapist always says... baby steps. good luck and take care.