This period of time must be fast. After mastering the most basic aerobic, chest, back, legs, shoulders, waist and abdomen training methods, practice immediately. Good fitness effect really needs theoretical knowledge reserve, but it is easy to talk on paper without practicing optics. Many times we talk about feeling the strength of the target muscle, but in fact, you have to adjust your movements and think many times before you can find the point of muscle strength.
We talk about breathing, but everyone and everyone adapt to different areas. Even if there is theory, it is difficult to find a method suitable for them without practice.
So learn some knowledge first, enough for you to practice in a cycle, and then learn while practicing.