My car stopped working. I painted it black and now it's running!
I'm taken aback by what you just said. Is this really what you think about black people? Is this something you've been thinking of saying?
I really don't care about them. I think black people are just athletes and runners, that's it.
Thinking that black people are only good for participating in sports is wrong and an outdated and racist view. Black people are not necessarily any more athletic than anyone else and joking about that misconception helps to spread racism. It would be a good idea to learn more about the accomplishments of black people other than in sports and understand that sports are only just a fraction of the accomplishments black people have made throughout history.