It's not the size of the body that matters, it's what the size is composed of. Fat and muscle especially round the thighs can look much the same when the shorts fit everywhere they touch. I was in Row C and it's the closest I've been to Hamer. I was astonished at the bulk of his thighs in particular. If his thighs are all muscle, then that will restrict his athleticism in terms of speed and endurance. He'll also have to eat plenty to keep those muscles fed and they will need plenty of oxygen to keep going which itself takes a lot out of you when you're playing sports. Of they're not all muscle, well, summat needs sorting.