Well, I figured before they left for their hike they ate as much as possible, you know, packed their cheeks for when times got tough.  But then, once they hit the road some nice people came and gave them rides and food and stuff, and so they weren’t able to work off all that extra lard.  So, I believed, their hope was then to come to the U.S. and get free health care which would, of course, include a free membership at the gym, so they can get back to their svelt selves.  This video has completely destroyed my theory. She was never svelt.