The first type: supine flexion and extension arm. This is a very classic triceps exercise, because many people can't grasp the feeling of exerting force and will hurt their shoulders, so they give up this action. In fact, when we go to the barbell, we can't lean back partially, because I will put a lot of pressure on your shoulders and back at this time, and if you don't control it well, you will hurt yourself. So when we make dumbbells, we should focus on the scapula and keep it stable. If you do it a few times more, you can make it more stable.
The second type: pull-ups. Pull-ups are something that many people in the army do every day, because pull-ups are actually very difficult. Ordinary people can only do five to seven, but it is not a problem for long-term training people to do thirty in a group. Moreover, pull-ups are the strength to support the whole body with arms, and it takes a lot of strength to do up and down movements there.
Third: Everyone can do sports at home without any tools. Push-ups can not only exercise your arms, but also exercise your abdominal muscles, which is very helpful to your health. The operation is also very simple, without anyone's guidance, and there is no limitation of space and equipment. As long as you have time, you can start practicing at once. ?