My Dad and his brother both have T2D. My Dad is 75 and my uncle is going on 60. They are both very active, in shape, and not overweight at all. e.g., My Dad

My Dad and his brother both have T2D. My Dad is 75 and my uncle is going on 60. They are both very active, in shape, and not overweight at all. e.g., My Dad was playing tennis 4 times a week when he was diagnosed. He's probably cut down some since, um, he's 75, and has had two hip replacements, but he's in way better shape than I am. Neither were significantly overweight when they were diagnosed. In fact, my Dad has been trim for decades, and while I don't see my uncle often, he was always thin and very fit-looking when I have seen him. There _has_ got to be a genetic component independent of lifestyle and diet choices. Me? I have no excuse. I'm overweight and not active and I know I need to change that. edit: Didn't proofread.