Bangkok changes people haha. When I was there, it was lot of walking and somehow I got used to it. Now, I walk daily even for an hour. I think I roughly lost 20 pounds from walking when I was there. Also, keep it up and don't complicate the whole thing :D
I mostly had to do it so that @hiddenblade could get a lot of pictures taken with her camera, lol. But I didn't mind it, people are so nice there so it's not like others may imagine New York or something where they think many people equals difficulty to walk on the streets. The only thing that was annoying was getting from places during rush hours, a couple km's could some times take an hour while we contemplated why we took a grab/taxi in the first place.