 It set the rule for later sculptors like Praxiteles and Lysippos, whose contrapposto, or ponderation, is more emphasised than the "subtle equilibrium of outline and axis which is to be the basis of classical art" exhibited by the Kritios Boy's "delicate balance of movement"

The Kritios Boy exhibits a number of other critical innovations that distinguish it from the Archaic "Kouroi" from the seventh and sixth century BC that paved its way.The Archaic style relied more on geometrical shapes to define the contours of the human body.The muscular and skeletal structure of Kritios Boy are depicted with unforced lifelike accuracy of flesh and bone, with the rib cage naturally expanded as if in the act of breathing, with a relaxed attitude and hips which are distinctly narrower.