Inclusion Criteria:  Age between 50 to 70 years old BMI between 25 and 50 kg/m2 Pre-diabetic (fasting glucose: 100-125 mg/dl or HBA1c 5.7%-6.4%) Sedentary or lightly active 24 Are post menopausal (absence of menstrual cycle for 1 year)  Exclusion Criteria:  Diabetic (fasting glucose: >126 mg/dl or HBA1c >6.5%) Have a history of eating disorders (anorexia, bulimia, or binge eating disorder) Have uncontrolled hypertension, any other cardiovascular disease, or history of aneurysm History of alcohol dependance (score >20 from Alcohol and Health Questionnaire)25 Are not weight stable for 3 months prior to the beginning of study (weight gain or loss > 4 kg) Are not able to keep a food diary or activity log for 7 consecutive days during screening Are taking drugs that influence study outcomes (weight loss, glucose-lowering medications) Are premenopausal, perimenopausal or have an irregular menstrual cycle (menses that does not appear every 27-32 days) Mobility disability (unable to exercise for 40-60 minutes 3-5 days/week) Diagnosed comorbidities including systemic diseases (Parkinson's cirrhosis, renal disease or systemic rheumatic conditions), cancer, or cognitive impairment Are night shift workers Are smokers