| Recruiting | N/A | 36 | US | Bright Light, Bright Light Treatment, Bright Light + Exercise + Melatonin, Bright Light Treatment + Treadmill Exercise + Melatonin, Control, Placebo Control | University of Arizona, University of California, San Diego | Circadian Rhythm Sleep Disorder, Jet Lag Type | 05/23 | 05/23 | | |