If you are a novice, it is recommended to find a friend to take you to get started. If you don't have friends to exercise or your friends don't practice well, it is recommended to find a private tutor to take you to get started. It doesn't need much. It only takes a few classes to master the basic principles of action and fitness. After all, economic conditions are limited.

As for the reason:

1, although there are many demonstrations of fitness movements, beginners rarely get it right when practicing. A slight mistake may lead to injury after bearing weight, and at the same time, they adapt to the wrong movements at the beginning, which is difficult to change in the future, and may also lead to muscle deformation. The most common: pull-ups are the exercise of back muscles, but many people mainly use the strength of two heads to pull up. Hard pull squats can easily lead to knee injuries if they are not done correctly. Personal training can help you activate your target muscles and teach you correct movements.

2. The more painful the stimulation of fitness in a tired state, the more growth hormone will be secreted. Only by increasing weight can muscles keep growing, then you need someone to protect you, either your muscle friend or your coach.

PS: I've been practicing for five years. In the first year, I practiced blindly and dislocated my lumbar spine once. Later, I took part in private education for three months and contacted my muscle friends.