People who are obese and have type 2 diabetes in their 20s will be at higher risk of having a heart attack or stroke in their 40s if they do not change their lifestyle. ""If your blood pressure is 136/88 and you're a man with a waist over 40 or a woman with a waist over 35 it spells trouble," said Dr. Dale J. Hamilton, diabetes clinical services chief at The Methodist Hospital in Houston...