Do I have to practice dumbbells in groups? What action does the group do?
When grouping, it will inevitably be said that practicing in one breath today will only be tiring and ineffective. One view is that you should even have different specific movements in that part. You can go to Muscle Network or other fitness forums. For example, if you want to practice bending your arms and then lifting the most basic chest exercises, you should do the basic movements of birds first, and then do the complex and difficult barbells with small muscles, and the effect is obvious.