How Can Smart Watches Know the Time We Sleep?

All smart watches on the market; heart rhythm monitors, blood pressure meters, blood oxygen level, various exercise trackers, It is equipped with stress analysis and sleep tracking systems.

Well, but none of these devices How accurately did you measure? did you think?

First, let’s take a look at how smart watches track our sleep.

Sleep tracking, usually motion or heart rate detection It is done using different methods such as actigraphy. Actigraphy, or wrist movement detection, allows the band to detect your movement to track your sleep patterns.

Smart watches to track your movements and detect which stage of your sleep cycle you are in Uses gyroscope or accelerometer.

Some smart watches It uses heart rate sensors to monitor your heart rate. Your heart rate decreases while you sleep and also changes as you reach different stages in the sleep cycle.

Therefore, this data change allows the watch to track your sleep cycle. to follow closely and helps keep track.

Let’s get to our real question: How accurate is this tracking?

Many studies have shown that these devices are known as the gold standard in diagnosing sleep disorders. Only 78% accurate results compared to polysomnography tests It shows that you gave.

When estimating the time it takes to fall asleep, this The accuracy rate drops to as low as 38%. We can say that analyzing brain waves is the only way to determine exactly which sleep stage a person is in.

Smartwatches use body movements and sometimes heart rate data to make sleep predictions.

Considering that we move frequently during sleep, it is important to know which sleep stage we are in. It is highly unlikely that they will provide accurate information.

Also, companies What algorithms does it use to make sleep predictions? is generally unknown, making it difficult for scientists to assess how valid these predictions are.

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