Black males have denser bones. This helps in athletic activities, but makes them less buoyant when trying to swim.
Never mind
The PC numbnuts will chime in that your study is a lie and its whiteys fault
Or race is just a social construct etc
I see a few of them here already
I’m from Mississippi...my hometown is now 80% black
Its physical....down here they have owned all the municipal pools since the 60s and city govt since 80s
Bone density is primary culprit and different muscle structure better suited for springy and burst talents than the long muscles for swimming
Every race has strong and weak suits