If the differences between successive weight entries in Table 2.7 are computed to determine how much weight is allowed for each additional inch of height,it will be seen that throughout a large portion of the table,a constant 5 Ib per inch is allowed(with some fours and sixes appearing at the lower and upper ends of the scales,respectively).Certainly this last rule is more liberal than the rule recommended for marathoners(2 Ib per inch),but just how reasonable a constant-weight-per-height rule is remains to be seen. In this section we examine qualitatively how weight and height should vary.