Yeah.....ummm okay I had to laugh a little when I saw this. Rob is super buff oh yeah he is just the workout machine with a six pack and biseps for days!
(Enter a truckload of sarcasm here)

Robert Pattinson: Apparently, flying around the forests of Forks, Wash., and hunting Bambi keeps a vampire in -- dare we say it? -- ageless shape. The "Twilight" star has a lot more going for him besides those dreamy eyes: a buff, lithe body. He told Entertainment Weekly that he... more went a bit overboard in preparation for his role as Edward: "I used to go to the gym for about five hours a day but then I started losing so such weight. My head started to look really huge in comparison to the rest of my body." Now he's back to just the right proportions.