Diet and Exercise Intervention in Type 2 Diabetes

Inclusion Criteria: 1. Age 25-68 yrs old 2. BMI 27.0-50.0 kg/m² 3. Diagnosis of type 2 diabetes based on HbA1C\>6.5% or results of an oral glucose tolerance test or current use of anti-diabetic medications 4. HbA1C ≤9.5 %. 5. Work at Washington University in St. Louis, Barnes Jewish Hospital, St. Louis Children's Hospital, Shriners, St. Louis College of Pharmacy, Central Institute for the Deaf, Rehabilitation Institute of St. Louis, and/or any institutions affiliated with these. Exclusion Criteria: 1. Any change in diabetes medication in previous 3 months 2. Treated with \>0.5 units of insulin/kg body weight per day 3. Unstable weight (\>2% change during the last 2 months before entering the study) 4. History or evidence of serious pulmonary or cardiovascular disease, including acute coronary syndrome, heart failure requiring medications, or New York Heart Association class III heart failure (patients with marked limitation of activity and who are comfortable only at rest) or IV heart failure (patients who should be at complete rest, confined to bed or chair and who have discomfort with any physical activity). 5. Evidence of serious cardiac abnormalities during exercise stress testing that increase cardiac risk of initiating an exercise program. 6. Creatinine \>1.5 mg/dL 7. Microalbuminuria; spot urine albumin:creatinine ratio \>50 (50 μg albumin/mg creatinine) 8. Coagulation disorders 9. Anemia (Hemoglobin \<10.0 g/dL) 10. Liver enzymes (ALT and AST) ≥3 times the upper limit of normal 11. Uncontrolled proliferative diabetic retinopathy 12. Severe peripheral neuropathy diagnosed by monofilament testing 13. Severe organ dysfunction 14. Pregnant or breastfeeding 15. Participating in regular exercise (\>1 h of structured exercise/week) 16. Joint replacement within the last year 17. Smokes tobacco 18. Severe lactose intolerance 19. Take any medication that might interfere with interpretation of the metabolic studies 20. Unable or unwilling to follow the study protocol or for any reason the research team believes the volunteer is not an appropriate candidate for this study, including non-compliance with screening appointments or previous medical visits.