Preparation materials: 4 cold empty bottles, large transparent tape, scissors and sand.

Production method:

1. Tear off the sealing film of the empty bottle.

2. Wash the bottle and drain the water.

3. Fill one of the bottles with sand.

4. Take an empty bottle and reverse it.

5. Then the two bottles are tightly wrapped with transparent tape, and the dumbbell is made.

Dumbbell, English name dumbling, is an auxiliary equipment for weightlifting and fitness. Smaller than a barbell. The weight of the light dumbbell is 1, 2, 3, 5, 8, 12 lb (1 lb =0.4536 kg) and so on. The weights of heavy dumbbells are 10, 15, 30 kg, etc. Because there is no sound during practice, it is named dumbbell.