Is the exercise sleep quality of Xiaomi accurate?

Accurate 1, the working principle of sleep detection is also the use of gravity sensing. When the human body has weak movement (turning over and covering), the bracelet will recognize it as light sleep.

2. During deep sleep, the whole human body is relaxed, so there is basically no movement change. At this time, the bracelet will be recorded as deep sleep.

3. When there are big moves, the bracelet will record that you are awake (orange in the picture, such as getting up at night. Of course, you can also see it through my language description. In fact, this technology will also have great errors. For example, I won't fall asleep immediately after turning off the lights, but at this time the bracelet has recognized that you are beginning to fall asleep.

4. Although mi band doesn't need to manually switch sports/night mode, if you are used to taking a nap, the bracelet will not record the nap as normal sleep, but only record that you haven't exercised during this time.

5.mi band consists of three-axis gravity sensor, recorder, Bluetooth 4.0 module and processor.