1, add sand, you can put sand in the dumbbell to increase the weight. This method is relatively simple, but you need to pay attention to the density and filling uniformity of sand.

2. Using weight plates, you can add weight plates at both ends of dumbbells, thus increasing the weight. The weight of the weight plate is generally fixed, and different weight plates can be selected as required.

3. Use the weight plate, which is a device specially designed to increase the weight of dumbbells. Weight plates with different weights can be selected as required and installed on dumbbells. Dumbbell is an auxiliary equipment for weightlifting and fitness. Smaller than a barbell.