If you have 10 or more pounds to lose, you’ll burn the MOST  FAT if you walk 3.1 miles per hour!  There – I’ve said it!  That’s a brisk stroll — you can catch up with a friend via cell, listen to a book on your ipod, and you won’t even sweat so you can walk on your lunch hour.  Bring your sneakers to work! The study was in The Journal of Sports Science and Medicine.