1st. Not all of the slave owners were doing inbreeding.
Nor were all slave owners breeding slaves like livestock. Black women being raped was very common. Are you going to give white people praise too for mixing their DNA with black people since most slave descendants have european blood?
2nd. Like i said my point was about people of African decent being more athletic, not just descendents of slaves. A 6 year old kid outside playing is not playing because he wants to train to be an NBA player and a 6 year old white kid is not focusing on being a doctor.
When that 6 year old kid from the hood gets older hes going to see sports as his meal ticket to a better life compared to the kid from the burbs. Thus hes going to work harder for it.
3rd. So how do you explain football positions. Why are the positions of speed dominated by black people yet the other positions have white people playing them as well? So you saying the white kids who played WR, CB, and RB growing up and in college focused on education and thats why they didnt have what it took to make it to the NFL but the white kids who played LB, OL, DL, and TE didnt focus on education so they made it to the NFL?
If youre trying to make the fast twitch vs slow twitch argument then go ahead, but that doesnt have anything to do with slavery.