Position of belly button apparently. who woulda thunk it. 
WASHINGTON â Scientists have found the reason why blacks dominate on the running track and whites in the swimming pool: itâs in their belly-buttons, a study published Monday shows.
Whatâs important is not whether an athlete has an innie or an outie but where his or her navel is in relation to the rest of the body, says the study published in the International Journal of Design and Nature and Ecodynamics.
http://newsone.com/591035/scientists-discover-why-black-runners-are-faster-than-whites/
WASHINGTON â Scientists have found the reason why blacks dominate on the running track and whites in the swimming pool: itâs in their belly-buttons, a study published Monday shows.
Whatâs important is not whether an athlete has an innie or an outie but where his or her navel is in relation to the rest of the body, says the study published in the International Journal of Design and Nature and Ecodynamics.
http://newsone.com/591035/scientists-discover-why-black-runners-are-faster-than-whites/

