Additional meaning to " haista napa"

Kids of Finnish heritage and their fellow travelers usually remember just a few words and phrases of Finnish by the time that they're adults. One such phrase, haista napa or "smell my belly button,"survives long after it makes sense.
Anyway, a recent study indicates that the location of the belly button, if not its fragrance, is an important indicator of sports performance. The navel marks the center of gravity. A higher center of gravity is favorable for sports that involve running, while a lower relative center of gravity favors swimming. Athletes from West Africa typically have longer legs and higher navels. As a result, runners from this region tend to do better than Europeans.
The article, AFP: Belly-buttons key to success in sport: study, notes that some scientists are uneasy about drawing major conclusions from these findings because our troubled history of assigning attributes to racial or ethnic groups.