Circus dumbbell is a very heavy dumbbell with a thick handle. Put the dumbbell between your feet and hold the handle with both hands. Grasp the dumbbell to one shoulder with the strength of straightening the hips and knees, and then release the other hand.

2, ordinary dumbbells fixed weight dumbbells. Cast with pig iron, with iron bars in the middle and solid balls at both ends. Adjustable dumbbell. Similar to a reduced barbell, round iron pieces with different weights are placed at both ends of a short iron bar about 40 ~ 45 cm long, which can increase or decrease the weight during weightlifting or fitness exercises.