its actually true

there was a big study done on it, ill find something on it if i can

but athleticness was tested on different races from an early age right through to late teans

for instance black kids could run much faster than any other race at all ages

they have a lower body fat percent which seems to make the difference, but even when you take say 5 black kids and 5 exception white kids all with the same body fat percentage, the results are closer, but the black kids still run faster