Abstract: This paper aims to study the nature of sports items, the existing mode of "quality" and "quantity" of sports items and their dialectical relationship, the nature of "quantity" and the prescription of the training quantity standard in relation to actual combat target (sequence), the energy dissipation and time dimension of quantity, the relationship between "payload" and competitive target state (sequence and ability for special items), the biological mechanism of "sequence" formation, the endogenous logic standard of competitive training quantity and the design principle and application of scientific control of effective exercise "quantity", The paper further analyzes the logical basis of "payload" design in competitive training, the existing mode of training load "quantity" and its relationship with biological adaption, the conventionality of factors within the "quantity" standard in competitive training items, the complexity of "quantity" components, and the design and controlled application methods of "quantity" movement in competitive training.

Key words: Competitive Sports, Training, Effective Training, Quantity of Training