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.Vertainly 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.