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Applications help analyze the quality of sleep is nothing new. I use such cooperating with my watch – all the time shows that sleeping too little, even when I’m properly rested.

Application Entrain, developed by researchers at the University of Michigan but was created as an aid to travelers who are suffering from ailments related to the change of time zones (ang. jetlag). Researchers have, however, including the own goal – the user application could agree to share anonymous data on their own sleep for scientific purposes.

This was the data collected by the application Entrain in the past two years, subject to analysis, in the hope of better understanding the phenomenon of human sleep.

We have lived longer as a result of the first analysis – published in the scientific journal Science Advances. What could we learn from it?

For example, they found that women sleep more than men, and the least sleep middle-aged men. As for the differences between countries, it Entrain data shows that the Dutch sleep about an hour longer (an average of eight hours and 12 minutes) than residents of Japan or Singapore (an average of seven hours and 24 minutes). British sleep well below eight hours, slightly less than the average inhabitant of France.

The biggest impact on sleep duration is … of course an hour of walking to sleep.

It’s pretty obvious conclusion – the later we go to sleep the less we sleep – the application users could not afford for lying to the south, and had to get up in the morning to school or work. Interestingly, it turned out that such a relationship does not exist between waking up early and the amount of sleep. As noted, however, Professor Daniel Forger in an interview with BBC News, the most important problem is the why actually one little sleep – there is a huge difference for the body, or spent the evening hours relaxing with family or friends, or working to late.

also confirmed the conventional wisdom about the exposure to the sun “pulls” the energy in us – in fact, being a long time in sunlight causes the earlier you put in, and sleeping longer. Of course, correlation does not imply causality, and requires additional research.

Another study, this time variation and degree of differentiation hours, and sleep duration by age, showed that young people are as a group in this respect more diverse than older ones. this means that there is a much greater chance that any randomly selected group of young people of their habits of sleep will be different than it would be so among older people who have followed in this regard unification.

the data obtained by means of the application is a curiosity scientific and example innovative use of technology by scientists. by giving users the ability to use the application to prevent jetlagowi, by the way gathered information about their sleep. however, one may argue about what is the quality of the obtained data – assuming that the application, interested mainly people a lot of traveling by plane, which may result in that they are unreliable.