Among those at high risk for type 2 diabetes, women with a history of gestational diabetes mellitus (GDM) are at substantially increased risk. Smart exercise may help prevent their progression to type 2 diabetes, in addition to its benefits during pregnancy and for the fetus. The study of the blocking effect of exercise between gestational diabetes and type 2 diabetes is represented by a study conducted by scholars at the National Institutes of Health that examined physical activity, sedentary behaviors such as television viewing, and the role of these behavioral changes in the progression of gestational diabetes to type 2 diabetes. Fifty-nine thousand two hundred and eighty-seven people with gestational diabetes were enrolled in the study, and these female patients were followed for 15 years. Patients were assessed for physical activity, television viewing, and other sedentary behaviors. The presence of type 2 diabetes was finally determined by patient self-report and confirmed with a supplementary questionnaire. A total of 635 patients developed type 2 diabetes during the C-year follow-up of 59,287 people with gestational diabetes. For every 5-hour increase in total exercise metabolic equivalent/week [(MET-h/w) (equivalent to 100 minutes of moderate-intensity exercise per week) the risk of type 2 diabetes was reduced by 9%, and this negative association remained significant after additional correction for body mass index (BMI). In addition, increased exercise was also associated with a reduced risk of developing type 2 diabetes. Women who increased total exercise by ≥7.5 MET-h/w (equivalent to 150 minutes of moderate-intensity exercise per week) had a 47% lower risk of type 2 diabetes compared with women who maintained the same level of total exercise, and this association remained significant after additional correction for BMI. National scholars in gestational diabetes research have concluded that an increase in exercise alone is a beneficial factor, and that the choice of exercise program, exercise risk avoidance, and control of exercise intensity should be individually designed for gestational diabetics. Increasing the amount of exercise can reduce the risk of progression of gestational diabetes to type 2 diabetes, but at the same time, it is important to take into account the most important goal of gestational diabetes gestational diabetic pregnancy and fetal security.