Fitness instructors can wear smart watches or sports watches in their daily work, which is helpful to master many sports data such as heart rate, steps and mileage during exercise. Smart watches have powerful built-in functions, which can monitor sports data and GPS positioning. Real-time, and can also be linked with mobile phones to realize the functions of call reminder, message push, positioning, etc., which is convenient for coaches to grasp relevant information in time. Common brands of sports watches are Apple, Xiaomi and Huawei. It is suggested to choose a watch that suits you, which will help to improve the exercise effect and monitor your physical condition, and improve your health and success rate.