Very slightly higher bone density but mainly as with most racial correlation things it's social conditioning, parental cultural influences e.t.c
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When I went to Mauritius, I noticed that a lot of the locals can't or won't swim, apparently it is because a lot of them are brought up to fear the sea
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Woudl bone density really play that much of a part?
I would think muscle to fat ratio would be a much bigger influence.
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