RM is the abbreviation of Repetition Maximum, which literally means the maximum number of repetitions, and free translation is the maximum number of repetitions.
Because the reference frame of anaerobic training is mostly based on the trainer himself, when we do professional discussion on physical fitness, RM is used as the weight unit to discuss it, which is more extensive than kg directly.
To put it simply, RM and KG are both units of weight, but one is a relative unit and the other is an absolute unit.
For RM, our plan with the same goal has the same discussion area for different individuals. For example, a friend weighing 72kg bends 6RM to weigh 30kg, and another friend weighing 60kg bends 6RM to weigh 12kg.
In modern bodybuilding training, groups and sub-rules are the most basic elements of training activities. In order to express the specific content of this element in a unified and standardized way, at present, most of them accept the "RM" notation in the formulation of training plans and the arrangement of curriculum plans. Such as: "6 ~ 10 RM/6 ~ 10, 8 ~12rm/8 ~10rm/8 ~10rm.
In this way, there are not only the index requirements of load intensity and load quantity such as the number, frequency and intensity of each group, but also the performance of load rhythm and aggravating mode, so it is easy to understand and operate. As for why it is difficult to see the specific weight in books and periodicals, it can be understood that the weight used by everyone, every body part and every movement is different, and it is difficult to explain the rules of strength with specific weight, so it has no universal guiding significance. But personal plans can sometimes write specific weights directly.
Baidu encyclopedia -RM