This could go into several groups but will leave it here
Britains greatest sportsman is arguably Steve Redgrave and just found out he has T2D from 15 years ago
http://www.diabetes.co.uk/celebrities/steve-redgrave.html
Reading these is rather depressing, no talk of diet just all of how to combat it Of course it is likely in his position in training he was eating carbs upon carbs and yet at no point do they link this In fact it said he went onto a low star diet but had to revert back and then treat with insulin !
They also claimed it was in his genes, but T2D is not in genes, insulin resistance is !!