I am struggling to see racism. I truly am. I mean, the hair thing made me snort, it was that silly! My children swim all the time and I don't think I've ever heard them moan about their hair
My husband shaves his head cos he can't be arsed with his hair (although he is hurtling towards 50 and that shiny scalp- aint no hair growing THERE I can tell you!). If someone wanted to be a swimmer and their hair was a faff, they could take a bloody razor to it!
There is discussion of the foulness that was slavery and discussion of that - is that racism?
There was speculation that different people have evolved in different ways, based on the conditions that they live in - racism?
There was a theory that different body types and different body shapes are better suited to different types of sports - racism?
and my husband's joke about the lions, of course - is he racist against himself? 
now, these theories may not be correct, but that doesn't make them racist. It isn't racist to discuss evolution, body types, diversity, a body type being better suited to one thing over the other.
There may be ignorance. There may be ill thought out theories that have no scientific merit, there may be those that do. But I don't get any sense that anyone is saying that anyone is better than anyone else. Just different.