Sleep and Circadian Research Program
Fabien Cousteau’s Mission 31

Clayton Sleep Institute (CSI) researchers teamed with Fabien Cousteau’s Mission 31 aquanauts to study sleep and circadian patterns during a 31-day mission at the underwater marine lab, Aquarius, located 63 feet under the waves off the coast of Florida.

The study, “Sleep/Wake Monitoring with Actigraphy during a 31 Day Underwater Marine Expedition,” utilizes Actigraph 2 devices to monitor and record activity, sleep, and light for the duration of the expedition and an additional seven days after surfacing.

The CSI investigative team met with Fabien Cousteau’s Mission 31 aquanauts prior to “splash down” on June 2 to demonstrate the Actiwatch 2, which resembles and is worn like a wristwatch. The aquanauts wore the Actiwatch 2 at all times, except during dives. They also maintained a brief daily sleep diary for the duration of the study, and completed general health questionnaires before and after the mission.

On July 9, CSI researchers will receive the Actiwatch 2 devices from the aquanauts and download the data for in-depth analysis and study.

Principal Investigator

Dr. Joe OjileThe principal investigator for the study is Joseph M. Ojile, MD, chief executive officer of Clayton Sleep Institute.




Dr. Christopher DrakeChristopher L. Drake, PhD, bioscientific staff investigator at the Henry Ford Hospital Sleep Disorders and Research Center



Mark Muehlbach - Staff Clinician, Director, CSI Clinics, Director, CSI Insomnia CenterMark J. Muehlbach, PhD, director of the CSI Research Center and director of the CSI Insomnia Center



Dani OverstreetDanielle Overstreet, CCRC, RMA, EMT-I, AB, co-director of research at CSI.






Clayton Sleep Institute combines with Fabien Cousteau’s Mission 31 for sleep research
Medical researchers study sleep in aquanauts living under the sea

Fox 2 St. Louis interview with Dr. Ojile (06/26/2014)