As we all know, traditional fitness training focuses on muscle hypertrophy training. In the early days, people understood that going to the gym was to exercise muscles. They think that whoever raises his hand can exercise huge protruding muscle bumps, and muscle lines can be exercised many times with a small weight. There are too many similar fitness misunderstandings. This question should start with the factors that affect whether you become a muscle line or a big guy, and then start with the training starting point of fitness people.

1, congenital genetic cause. 2. The results of acquired training methods.

Let's talk about congenital factors first. According to the constitution classification proposed by American psychologist Sheldon, the human body is divided into three embryonic types.

1, endoderm type: this kind of people have developed digestive organs, so they are plump, like comfort, communicate with others and get along easily. So it is also called visceral robust type.

2. Mesoderm type: This kind of person is strong, muscular, slow to respond to pain, aggressive, and often rude in communication. This kind of person is also called "vigorous type".

3. Ectodermal type: This kind of people are slender and slender as a whole, and are not easy to gain weight. The nervous system is relatively developed.

In other words, people with congenital ectodermal body have no advantage in training big men, so such people will look for their own sports expertise from their own conditions, grow into their own hobbies, and even become professional athletes. For example, badminton, fencing, martial arts routines and other special training that requires strong physical flexibility and sensitivity. So they exercise to strengthen muscle strength and further strengthen flexibility and sensitivity. For them, they don't need too much muscle mass to engage in such sports. However, people with mesoderm or partial endoderm are more inclined to strength lifting and bodybuilding. Relatively speaking, they are more likely to grow muscle blocks. In addition, their training purpose is to lift more weight, which requires great strength. Of course, they must have corresponding muscle mass and weight to support them, so large muscles become extremely important.