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* Recovery immediately following exercise is impaired by poor sleep<ref name="SleepDepRecovery"/>.
* A lack of sleep is linked to [[Sleep and Obesity|Obesity]].
* Even mild sleep deprivation produces similar impairment to alcohol. After 17–19 hours without sleep, which is being awake from 0800 to 2230 and 0100, a study showed test performance was similar or worse than that at a blood alcohol level of 0.05%, and response speeds were up to 50% slower for some tests<ref name="Williamson2000"/>.
=How the Zeo Works=
The Zeo uses a headband to monitor brain waves and transmits to the information to a base station, or to supported phones or tablets. The Zeo determines what sleep stage you are in with reasonable accuracy. From this, the Zeo gives an overall score to your sleep (ZQ), as well as recording how long you sleep in each sleep stage. The app provides reports on your sleep history and can automatically upload the results to the web for more detailed analysis.
<ref name="SleepCDC">CDC - Sleep Home Page - Sleep and Sleep Disorders http://www.cdc.gov/sleep/ </ref>
<ref name="OTEcssPos">Prevention, diagnosis and treatment of the Overtraining Syndrome http://www.ingentaconnect.com/content/tandf/tejs/2006/00000006/00000001/art00001 </ref>
<ref name="Williamson2000">A M Williamson, Moderate sleep deprivation produces impairments in cognitive and motor performance equivalent to legally prescribed levels of alcohol intoxication, Occupational and Environmental Medicine, volume 57, issue 10, 2000, pages 649–655, ISSN [http://www.worldcat.org/issn/13510711 13510711], doi [http://dx.doi.org/10.1136/oem.57.10.649 10.1136/oem.57.10.649]</ref>
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