When a training session is in poor condition and cannot complete the scheduled content, how to judge the nature and reasons of this poor condition, how to adjust the remaining time of this training session and how to adjust the content of the next training session? After a period of training according to the training method of a project, it is suddenly necessary to engage in the training of new projects temporarily (such as requiring weightlifters to participate in competitions such as shot put and tug-of-war in schools or units). How to adjust the training plan to ensure the realization of short-term goals (getting good results in shot put or tug-of-war) and long-term goals (improving weightlifting)? From the strength level, the trainer at this stage should be able to push nearly 1.5 times the body weight, squat nearly twice the body weight, and pull hard to reach or exceed twice the body weight. Advanced-the stage of "knowing why". Trainers at this stage have gained a new understanding of training theories and methods through the interpretation of their own experience, and have been able to handle most of the problems in training freely, from "treating symptoms with medicine" to "treating medicine with numbers", but their understanding of strength training is still lacking in the overall concept (training is still considered separately in space and time), and they have not really understood the essence of training, so they cannot solve such problems.