As a kind of popular fitness equipment， treadmill， also known as running machine， plays an important role in helping people to maintain physical health. However， some people may encounter problems in using treadmill. Here are some solutions:

1. Noise problem: When the treadmill is used for a long time， it may produce noise， which affects people's use experience. To solve this problem， we can try to lubricate the running belt with silicone oil， which can reduce friction and noise.

2. Belt deviation problem: In the process of using treadmill， the running belt may deviate from the center， which affects the running effect and may cause safety problems. We can solve this problem by adjusting the tension of the running belt， or by using the synchronization adjustment device to adjust the deviation.

3. Speed problem: The speed of the treadmill may not be consistent with the display， which affects the accuracy of the exercise data. To solve this problem， we can recalibrate the speed sensor， or replace the controller board.

4. Electrical problem: If the treadmill fails to start， there may be a problem with the electrical system. The first thing to check is the power supply， and then check whether the fuse is blown. If the fuse has blown， replace it with the same type of fuse.

5. Safety problem: When using treadmill， be sure to pay attention to safety issues. For example， do not wear loose clothes， do not touch the treadmill while running， and do not leave the treadmill running unattended. In addition， the treadmill should be placed on a flat， stable surface， and keep children away from it.

In summary， to enjoy the benefits of treadmill while avoiding possible problems， we need to pay attention to proper maintenance， regular cleaning， and correct use. By doing so， we can make the most of the treadmill and achieve better fitness results.