I've been trying to loose weight so now I try to move rapidly on foot as much as possible. Do you run? 
I don't run, but I also haven't had weight issues. I used to do a lot of weight lifting, would like to get back into it.
Running is good for your heart. just 10 minutes a day you will live longer.  People have been running 2.6 million years ago, probably in order to hunt animals and get exercise.