In bodybuilding theory, RM is used to indicate the maximum number of repetitions that a load can do continuously. For example, an exerciser can only lift a heavy object five times in a row, so the heavy object is 5RM. 8 to 12RM has the best exercise effect for beginners. Each group should rest for no more than one minute, and each movement should rest for no more than two minutes. Not too many groups in each part, about 3 to 8 groups.