Clinical Research Directory

Inclusion Criteria: * fluent in English * 18.5\<BMI\<40 kg/m2 * no shift work in the last 12 months * no travel across time zones in the last 2 months. Exclusion Criteria: * Chronic disease-Medical history/prior diagnosis of the following: * cardiometabolic disease (e.g., myocardial infarction, angina, diabetes) * essential hypertension * hepatic impairment * severe obstructive sleep apnea * restless legs syndrome * parasomnia * neurological disease (e.g., early onset dementia) * unstable psychiatric disorders (e.g., bipolar disorder, schizophrenia, major depression with suicidality). * Drug/Alcohol use criteria: * Illicit drugs apart from cannabis or related products are prohibitive. * Volunteers may consume caffeine, however, \>3 cups of coffee (or otherwise equivalent of \>300mg/day) is prohibitive. * Participants who consume \>14 alcoholic drinks/week and/or have a diagnosis (or history) of alcohol use disorder will be excluded (a toxicological urine screen will be conducted to verify reported non-use during the initial screening and on the day of admission to the in-laboratory portion of the study). * Use of prescription or over-the-counter medications or supplements that affect sleep are also exclusionary. * Contraceptives are required for women and will continue to be taken throughout the experiment. * Prior Shift Work: * Volunteers must have no history of working irregular day and night hours, regular night work, or rotating shift work for the 3 months prior to the study.