The Effect of Exercise on the Brain in Type 2 Diabetes

The goal of this clinical trial is to learn if exercise training of high or moderate intensity is most optimal to improve brain health and prevent neurodegeneration in type 2 diabetes patients. The main question it aims to answer is: What is the effect of exercise training of high vs. moderate intensity on brain metabolism, brain perfusion, and cognition in type 2 diabetes? Researchers will compare the exercise training groups to a control group without exercise training to determine the effect of exercise training on the brain in type 2 diabetes. Participants will exercise for 6 months, 3 times per week. Before and after these 6 months, they will undergo: * a brain MRI scan * cognitive tests * blood sampling