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=Accuracy=
Zeo has been compared with polysomnography (PSG) to verify its accuracy. (PSG monitors brain activity (EEG), eye movement, [[Muscle|muscle ]] activity and heart rhythm, and is the gold standard of sleep analysis.) The study stated that "Our results demonstrate that the [Zeo] accuracy is similar to but not quite as good as the two human scorers from different sleep centers compared to each other"<ref name="SleepZeoPSG"/>.
=Zeo Caveats=
* Getting slightly chilly before bed helps me fall asleep faster and the room temperature is critical for quality sleep.
* A brief nap does not impact my night's sleep, but a longer nap can be remarkably disruptive.
* I wake up briefly virtually every night at about 1am, so I now make a [[Protein|protein ]] drink to take at that time. This protein drink helps me sleep deeper in the second half of the night.
* Having a protein shake before bed may help increase the amount of time I'm deeply asleep.
* The amount of deep sleep seems to be critical for how I feel and how well I run, but other sleep stages are not so important.
* Waking up in the night does not affect my sleep quality as much as I'd expect, and I wake up far more often than I realized.
* Even slight levels of pain degrade my sleep quality dramatically. That shouldn't be a surprise, but I thought that once I'd gone to sleep, the pain wouldn't be a problem.
* I fall asleep quite quickly, and I can use a [[Pulse Oximeter]] as part of my relaxation routine. The [[Pulse Oximeter]] shows my [[Heart Rate|heart rate]], which gives me an idea of my stress levels, and acts as a biofeedback mechanism to show how well I'm relaxing. The CMS-50E has a graph of the heart rate, and I find this almost hypnotic.
=Other Tips for Improving Sleep =
* The cheapest are the simple apps that use a smartphone's accelerometer to measure movement and thus evaluate your sleep. It's not clear how well these apps work, and are likely to be dependent on the type of mattress you have, if you sleep alone or not, and the placement of the phone. On the other hand, they are remarkably cheap.
* The LARK uses a movement sensor that straps to your wrist and connects to a smart phone. This gives far more accuracy than simply relying on a smartphone on your mattress. The price is more expensive than the Zeo, with the LARK Pro costing $159. There is a cheaper version at $99 that does not include the ability to track sleep. More at [http://www.lark.com/].
* Gear4 Renew SleepClock has a different approach, using radio waves to detect movement and [[Breathing|breathing]]. It's more expensive than the Zeo at $199 and there is no supporting research about its accuracy. More at [http://us.gear4.com/product/_/410/renew-sleepclock/]
=References=
