More and more people like to exercise, of course, when they are in sports, they must wear fashionable sports watches. However, according to different standards, the types of sports watches are different. What kind of sports watches are there?
Sports watches can be divided into GPS watches, heart rate watches, and step watches by motion sensors.
1. GPS watch: It calculates the distance moved by unit time by receiving the satellite position signal, and calculates the speed of movement. Of course, the accuracy of the position is determined by the strength of the satellite signal and the sampling rate, such as 1 second sampling. The accuracy of the rate is obviously higher than the 60 second sampling rate, but too high a sampling rate will cause the battery to consume too fast. It has the advantage of recording the motion trajectory and synchronizing to the map.
2, heart rate watch: using the heart current of the human body to measure the heart rate of the human body, the heart rate of the human body at different exercise intensity is different, the international percentage of the heart rate of the heart rate is divided into a light activity: 50-60% , aerobic exercise 60-75%, endurance training 75-85%, intensity training 85%-100%, choose different heart rate areas can achieve different training and exercise effects.
3. Step watch: The motion sensor is a 3D accelerometer, which can sense the three-dimensional motion acceleration generated by human body movement, such as walking, so that the number of steps per unit time can be recorded. The advantage is that it can be applied to outdoor indoor sports without being affected by the weather. Very power efficient and can store motion data for a few days.
