Well I have always thought (and yes it's just my opinion) that Steve Redgrave proves you can't outrun (or out train) a bad diet. By 'bad' in his case I mean simply more food (calories) than his body was designed to take. It enabled him to train so very hard and be a massive success but at what cost?Couldn't agree more @zand. But I'm focusing on causes, not what aggravates T2 diabetes as a pre-existing medical condition. Moderating your carb intake does help with the managing of diabetes, both T1 and T2.