Although the sleep monitoring function of fitness watches is not used frequently, many fitness watches have added such functions, and the monitoring principle of smart bracelets is similar. Fitness watches actually use built-in sensors to monitor sleep data. For example, a three-axis acceleration sensor to determine the quality of sleep.
Simply put, the accelerometer can measure the quality of sleep according to the amplitude and frequency of the wrist movement when monitoring sleep, and the principle of this method has also been demonstrated by the paper, although its accuracy cannot be compared with the data monitored by PSG. But it can reflect the general situation of sleep.
From the actual experience of the individual, the sleep monitoring of the fitness watch can only achieve the monitoring effect, which can help you analyze the data of deep sleep, breathing, heartbeat, etc., but it can not accurately feedback the situation of sleep, and the true meaning of the hospital. There is still a certain gap in sleep monitoring, but personally, it is worthy of recognition as a reference for sleep.