<qa>  What is the goal of the project?The overall goal of this project is to test the hypothesis that long-term, sustained sleep restriction SR, in women, will lead to increased cardio-metabolic risk. This will be characterized by increases in visceral adiposity, unhealthy lifestyle behaviors poor dietary quality and low physical activity and cardio-metabolic risk factors blood pressure, glucose intolerance relative to habitual sleep HS. The investigators expect these changes to be worse in pre- compared to post-menopausal women. 