Smart bracelets, in our lives, are also called smart watches, smart pedometers, and mobile medical test tables. These are the names given by everyone based on its functions. The written definition of a smart bracelet is very simple. It is a wearable smart device that is displayed to people in the form of a watch and is easy to carry. It is commonly known as a bracelet. When people wear smart bracelets, they can record real-time data such as exercise, sleep, and some diet in daily life, and synchronize these data with mobile phones, tablets, and iPod touches to guide healthy living through data. The general smart bracelets on the market have different functions, and most of them are used to track health data. For example, it monitors user health data such as steps, mileage, calorie consumption, and sleep quality, and provides users with reasonable diet, exercise or sleep suggestions to help users better manage their own health. Most bracelets have 2-3 of these functions. Of course, there are also a few disease detection equipment used in hospitals in the form of watches, such as oximeter. But in hospitals, they basically call it an oximeter, and rarely a smart bracelet. Of course, some businesses call it a smart bracelet in order to sell it to individual users. Except for watch-type medical equipment used in hospitals to diagnose diseases, most smart bracelets currently on the market have not passed the secondary medical equipment test, or have not obtained a secondary medical device license. Smart bracelets without a medical device license should be called electronic products. The human health index they measure can only be used as a reference and cannot be used for medical diagnosis. Therefore, what we usually call smart bracelets in our lives are basically non-medical electronic products. Whether it is a foreign smart bracelet brand or a domestic brand, the core function of a smart bracelet is to serve as a health tracker to help users better manage their own health, which is very helpful for our daily exercise. So, is the accuracy of the smart bracelet’s step counting, calorie consumption, deep sleep time and other data reliable? Is the step counting function reliable? The pedometer is the core selling point of the smart bracelet. The pedometer principle is actually based on a three-axis acceleration sensor to track the number of steps. As long as the hand moves, it will be recorded. Many smartphones have this capability, which can function as a pedometer through a combination of built-in smart sensors and software. In fact, we can judge its accuracy based on its step counting principle. For example, if you sit on a chair and shake your hands, it will record the number of steps you take. However, the smart bracelet will record the user's daily walking status and goal achievement rate through built-in sensors, and record the movement trend over a period of time to help understand and analyze the user's health habits, which has certain reference value. How are calories burned calculated? The smart bracelet calculates calories by counting the number of steps, and then calculates the calorie consumption based on a certain algorithm, including the number of steps in various sports such as normal walking, jogging, and fast running. However, it is difficult to judge the number of steps in these sports. proportion and intensity. For example, if a person runs 21,000 steps, if the smart bracelet defaults to normal walking, there will definitely be a certain error compared with the calories consumed by running. In addition, the recording of the pedometer itself is not particularly accurate, so calorie consumption monitoring can only provide a reference for our calorie consumption. However, the mobile software of some smart bracelets has a diet monitoring function. Scan the food QR code or enter the name of the thing through the mobile phone software, and it will calculate the calories contained in the food. This manual input and the complexity of Chinese food make it difficult to The accuracy of the data produced will be relatively accurate, but it can only have a certain reference value for our diet, and people with diabetes can refer to it. Is the test of sleep quality accurate? Another major function of smart bracelets is to monitor sleep quality, including sleep time, wake-up time, light sleep time, number of wake-ups and deep sleep time. This is another promotion point of many bracelets. Some smart bracelets form a long-term mechanism through daily monitoring, charting long-term sleep quality trends to help you understand your sleep status and make improvements. But is sleep quality testing accurate? First, let’s talk about the sleep calculation of smart bracelets. Most bracelets calculate sleep based on a three-axis acceleration sensor. For example, turning over frequently indicates light sleep or wakefulness. However, medical detection of deep sleep or light sleep requires multiple parameters such as electroencephalography, eye movements, and chest and abdominal movements. Judging from this principle of calculating sleep quality, smart bracelets currently do not have EEG and eye movement functions. It can be said that sleep quality calculated only based on body movements can only be used as a reference and is inaccurate.
Of course, it does not mean that smart bracelets are not needed if they are not accurate. In daily life, there is no need to compare smart bracelets with medical instruments and equipment, because medical instruments must be accurate to treat diseases and save lives, otherwise lives will be lost, and we Just have a reference for your daily life. In general, smart bracelets bring fashion and fun to our lives and make our lives smarter.