I suposse his "skinny" structure and body shape, in addition to the fact that he has not developed a lot of musclature in the upper boddy, can fool people in general, but of course fs it's sport that requires strong and a lot of training, specially for legs, and giving the power and heigh all Yuzuru's jumps have, it's quite logical for him to have developed such strong legs. On the other side, he's not exactly and exhibicionist as other skaters *ahemJaviahem* and it's always quite surprising and amazing!!