2. Speed training: In this respect, it is best to practice before the age of 24, and then not to practice, but it is more difficult. The most direct way is to practice fast boxing, that is, the more times you punch within a specified time, the faster your speed (under the premise of correct punching posture). You need to practice repeatedly, and write down the times each time, which will help you improve next time. Another way is to do push-ups quickly. You can try it.
3. Endurance training: or endurance training. If you are tired before you defeat the enemy, it will be unreasonable. . . As for the method, I won't elaborate here, because basically like other sports, the most common one is endurance running.
4. Accuracy training: No matter how hard you punch, you will be disconsolate if you can't hit the target. Playing sandbags is an extremely effective method, but it may be difficult at first, because sandbags can be moved, so you can choose some still life to practice hitting. Remember to practice accurately and avoid empty fists, because you won't know if you hit the part you want until you hit the real thing every time.
5. Toughness training: It means that the fist should be wear-resistant and fight-resistant, which is often called "external training of bones and muscles". Imagine, if you hit a "soft fist", there is no lethality, and it is useless to practice. Well, before it's too late, you need to buy a pair of gloves first to avoid unnecessary injuries. There are two main methods: head-on and ground support training. The former is easy to understand, and the latter will hold the whole body on the ground with one or two fists for a period of time.
There is no direct sequence of these trainings, so you don't need to practice them all at once. It is best to look at the personal situation and focus on what is lacking.
PS: If you feel unwell or have not improved during training, you can stop for a while.