The basic action of deltoid training is to lift the barbell at the last moment. You don't need to lift the dumbbell above eye level, but you can lift it as high as or higher than your shoulders. You can train well if you persist slowly.

Practice method:

1, choose the right weight and practice dumbbells.

2, the purpose of exercise is to gain muscle, it is best to choose dumbbells with 65%-85% load. For example, if the weight you can lift each time is 10 kg, then you should choose dumbbells with a weight of 6.5 kg-8.5 kg for exercise. Exercise 5-8 groups every day, 6- 12 times in each group, and the exercise speed should not be too fast, and the interval between each group is 2-3 minutes.

Dumbbells can train a single muscle

If you increase your weight, you need the coordination of multiple muscles, and it can also be used as a kind of muscle compound action training.

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