Inclusion Criteria:  Premenopausal women operated for breast cancer and after completing adjuvant chemotherapy and no earlier than 3 weeks after its termination BMI: 25-30 Healthy controls will be included matched by gender, weight, age, and level of physical activity to the patient group included as subjects  Exclusion Criteria:  Known postmenopause occurred at the time of diagnosis of breast cancer Alcohol intake of> 7 items / week Smoker Already known Type 2 diabetes mellitus or metabolic syndrome and medical treatment thereof. Cardiovascular disease and its medical treatment Impaired mobility