I'm a 68 years old woman and for the past year have been a prediabetic (47?) Great genetic history. Father type 1 and mother type 2. I'm 5ft 9 and weigh 9st 2. Walk/jog 40-45k per week. Lot of hills! Don't eat sugary foods, pasta, rice, red meat,processed foods of any type. Diet fish, nuts, seeds, low carb fruits and plants. Don't drink alcohol. I've been the recipient of the usual advice - exercise more, lose weight, give up this food or that.It doesn't apply. So I am at a total loss as to what to do. It seems to me I'm fighting my genetic history, a battle I'm likely to lose some time or another. Over this past week, I've tried to really drop my carbs and then can't exercise because I'm weak, sweat profusely and pretty much feel like passing out. What can I do?