After confirming that those are water coaches, we can prescribe the right medicine. Some gyms also have good personal training, but not many. Generally, when you go to the gym, some fitness instructors will give you some simple sports knowledge on their own initiative, but after you are interested, they will recommend courses for you. At this time, everyone should pay more attention.
As for where to find a fitness instructor, you can go to some big gyms, or you can go to some big APP platforms such as keep, AIA, FitTime instant sports and so on. These are all softwares without too many fancy gimmicks, which are really practical. Finally, I hope everyone has a healthy body. After all, health is the capital of revolution.