Comparing Effect of Short Sleep Duration on Weight Loss of Overweight and Obese Women Attending a Weight Loss Program

Inclusion Criteria: * Must be female * Must have \< 7 hour sleep per night * Must be 18-45 years of age. * Must have Body mass index (BMI) between 27-35 kg/ m². * Must be able to have moderate exercise. * Must be interested to have weight loss. Exclusion Criteria: * Participating in a research project involving weight loss or physical activity in the previous six months. * Pregnancy or lactation during the previous 6 months, or planned pregnancy in the next six months. * Taking medication that could affect metabolism or change body weight. * Report heart problems, chest pain, and cancer within the last five years. * Smoking * Menopause * Diagnosis of any chronic disease such as fatty liver, cancer, chemo/radio therapy, heart disease, immune compromised conditions, abnormal thyroid hormone level.