According to China people's regular physique and exercise intensity, and considering the stage of increasing dumbbell fitness intensity in the future, the following dumbbell combinations are formulated:

Height 1.60m, weight 60kg-25kg；;

Height 1.70m combination of 70kg and 30kg;

Height 1.80m, weight 80kg-35kg combination.

Auxiliary equipment for weightlifting and fitness.

There are two kinds of fixed weight and adjustable weight:

① Dumbbell with fixed weight. Cast with pig iron, with iron bars in the middle and solid balls at both ends.

② Adjustable dumbbells. 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. Doing dumbbell exercises often can enhance the muscle strength of all parts of the body.

Refer to the above? Baidu encyclopedia-dumbbell