1. Determine the resistance: Generally speaking, the resistance depends on the number of pounds, and different pounds correspond to different resistances. Therefore, when buying elastic belt, you need to choose the right number of pounds according to your own needs and level.

2. Material: The material of elastic band is also very important, such as natural latex and artificial rubber. It is recommended to choose natural latex, because its material is soft, not easy to slip and has high safety.

3. Safety: Because elastic belt needs to bear a lot of tension, safety is very important. It is recommended to choose a brand with good reputation and safety certification.

4. Length and width: The length and width of the elastic band will also affect the use effect. Generally speaking, the longer the length, the greater the resistance, the wider the width and the better the stability. So you need to choose the appropriate length and width according to your own needs and level.

5. Price: Different brands and quality of elastic belt have different prices, so you need to choose the right brand and quality according to your own budget.

In short, when buying elastic belt, you need to choose the appropriate resistance, material, safety, length, width and price according to your own needs and level. It is suggested to choose a brand with good reputation and safety certification, and pay attention to the use method to ensure the use effect and safety.