I have never heard this line of reasoning before.
One of the hurdles to get over is say for instance, Why have those from the African continent - never slaves - have never managed to produce any great Olympic swimmers?
As for the hair explanation sounds like an urban myth.
Personally when trying to work out why one particular ethnic group and/or race is good at a particular sport. What actually is happening is a post-hoc analysis ie one observes say Blacks win many gold medals in the Olympic sprint. Then one tries to find an explanation or rationalisation for this which is racial - if you see the world through 'race' when in need not be.
An example close to home is that there is a considerable Asian population but literally only a handful in the football league which as around 90 clubs?
Why is it? Being Asian (ie genetically derived from the Indian subcontinent) means they are not good at football??
Sorry for interrupting the conversation - back to you guys as you were
You're certainly right that we're applying backwards reasoning, but that is often how researchers come to results when looking at society.
As for the hair thing, I know many black women who can attest to it, even with the change from a hot comb to chemicals used now, so I'm going off of them. Those that are still relaxing it avoid getting it wet as much as possible, and avoid swimming in pools.
Now for those that have natural hair, you do have swimmers, but in a lot of countries access to swimming pools is limited. It's very much a cultural thing in those instances.
I don't know much about football in India, I do know that cricket is very popular, and you do certainly see a good representation of Asian individuals in cricket. So it is very likely that a difference of representation in different sports is down to lack of cultural interest, and as such that lack of interest leads to lack of facilities and training opportunities.
I mean, gaming is a sport now, but it's dominated by East Asians rather than whites because it's seen as childish/a waste of time in the West.
Basically, there are a lot of factors to consider. Nothing is ever as clean cut as we'd like to think.