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The Actiwatch activity monitor

Week of 03/ 08/ 2010. NASA conducts research while orbiting more than 200 miles above the Earth to learn how humans and materials behave outside of a gravity-influenced world. Sleep-Wake Actigraphy and Light Exposure During Spaceflight-Long (Sleep-Long)

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The Actiwatch activity monitor

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  1. Week of 03/08/2010 NASA conducts research while orbiting more than 200 miles above the Earth to learn how humans and materials behave outside of a gravity-influenced world. Sleep-Wake Actigraphy and Light Exposure During Spaceflight-Long (Sleep-Long) Research Objective: Sleep-Long examines the effects of space flight and ambient light exposure on crewmembers’ sleep-wake cycles during long-duration stays on the International Space Station (ISS). Research Summary:During this investigation, crewmembers will wear an Actiwatch to record activity and ambient light levels. They will also document the amount and quality of sleep they are getting in a sleep log. This data will then be used to develop sleep disruption countermeasures for long-duration space flights. Timeframe: Sleep-Long began in 2007 on Expedition 14 and will continue through Expedition 26 in 2011. Earth Application:A better understanding of sleep-wake cycles can lead to improvements in diagnosing and treating insomnia. This work could benefit the health, productivity and safety of groups with a high prevalence of insomnia, such as shift workers and the elderly. More Information: Read the research summary at http://www.nasa.gov/mission_pages/station/science/experiments/Sleep-Long.html The Actiwatch activity monitor Astronaut Suni Williams performs her daily tasks while wearing the Actiwatch on her left arm. http://www.nasa.gov/exploration/multimedia/highlights

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