I have seen several threads like this so I'll apologize in advance for making this one (there are a few subtle differences).
I am around 300lbs right now and I have just started riding for exercise. I live in Bloomington, IN (Indiana University, Little 500) so biking around here is definately nice.
I have started off riding around 4 miles a day (up and down hills) and I can manage this with a medium to high effort (I am winded when I get back, but not sore the next day). I also ride the bike around campus all day so thats a little bit more.
What I am wondering is if you have any suggestions for how to go about this (more, less, more then less ).
I am also a vegetarian and I was wondering how I should adjust my diet to handle the increase in exercise.