Generally speaking, the muscles of each part should be trained with 10~20 groups, and the muscle gain effect will be the best. However, the amount of training will change with the length of training time. It is suggested that beginners train 10~ 15 groups per muscle group every week; The advanced ones are 16~20 groups.

But this figure is not absolute, because everyone's physical condition and fitness goals are different. If you want to know better how to make your own training plan, you can consult a professional fitness coach or doctor. They can make a more scientific and reasonable training plan for you according to your situation.