There are some bodybuilders who are all about size — pushing a muscle to the absolute maximum size it can reach. These bodybuilders are specialists, focusing on just one muscle as opposed to making the whole body a harmonious whole. Moustafa Ismail is one of them, and he holds the record for the largest biceps in the world. The rest of Ismail’s frame is harmonious and fit, but his bulging biceps — which he maintains with an insane exercise regimen and seven pounds of protein a day — are 31 inches in diameter. For reference, that’s about as big as an average man’s waist. Ismail denies any claims of cheating with stuff like Synthol injections and complains that it’s very difficult to buy shirts that accommodate his audacious arm muscles.