When I wrote about gas yesterday, I stumbled onto that study. I was actually looking for a documentary that the Discovery Channel did a couple of years ago. It was called "My Big Fat Body" and starred Frank Payne.
Frank was an actor from Chicago who came to comedy a little later in life. He had already been a wrestling coach and iron worker when he made a change in career. He was successful, too. Not Brad Pitt successful, but making a living as an actor.
He was also over 400 pounds. Hence the name of the show. It explained what that amount of weight does to a body. there were x-rays and motion capture images showing how his hips were perpetually abducted because of the weight on his thighs. It also seemed devoted to his weight-loss journey. The show was filmed in 2009, but a short film that he was in "Starf*ckers" in 2011 shows he was still at about the same weight. I recommend you watch it, it's pretty funny and has Kato Kaelin at the end.
In "My Big Fat Body" he talked candidly about how his weight scared him. Just like in the promo below, he talks about John Belushi, Chris Farley and John Candy. He lost a brother when he was a kid and didn't want his parents to have to bury a second son. Unfortunately, in January, 2012, his obituary appeared in the Chicago Sun Times.