The pectoral muscle and triceps brachii are one part: when practicing the pectoral muscle, the triceps brachii will also take part in a lot of exercise, so after practicing the pectoral muscle, you only need to do three sets of classic triceps brachii movements to fully exercise the triceps brachii, and the effect is obvious.
The latissimus dorsi and biceps brachii are divided into one part. Similarly, the classic movement of biceps brachii has three movements.
Deltoid muscle and leg practice together. The deltoid muscle is divided into toe, middle and back, and there are many movements, but five movements are summarized immediately.
This method is more suitable for beginners to practice and has a great effect. When the figure has changed greatly and the outline is generally clear, you can practice specifically for a single muscle to play a role in shaping.
Time is limited today. I'll help you divide it into three parts. As for the details of the exercise, I will write it out in detail after you adopt my answer.
The slogan of fitness is: be hard on yourself! A little harder.