There are too many precautions for hard pulling. However, the core stability of the waist is of course the most important. Don't bend over. This is the first place.

My suggestion is to practice more. Don't worry about the weight. . The early weight is too fast. Add 10 kg to practice once and add 20 kg. So the weight has increased. People get hurt easily. Look at so many bodybuilders who have been practicing for 5 years, 10 years, not bad. They're not stupid. They have been foreigners for so long. Good health. Eat well or safety first.