I think I know why Brazilians are generally so good at soccer. They are essentially a hybrid people as far as athletics are concerned. First in their gene pool we have those who were brought from Africa as slaves (The ones selected were the largest and strongest). We also have the Portuguese (As far as the earliest (European) settlers were concerned, the conquistadors were strong enough to man ships and survive long journeys). When the natives traveled over the Bering straight from current day Mongolia only the most persistent and physically capable could make it all the way through the Americas to Brazil.
So with these generally strong or fit and generally athletic genes mounting we get super footballers, who can be amazing even if they have beer bellies.
So with these generally strong or fit and generally athletic genes mounting we get super footballers, who can be amazing even if they have beer bellies.