131 Interpretation of Data. The d value for Group 1 reflect good muscular development and leanness based on a comparison with the d values of a Reference (Military Man)* and other groups. The da values for Group 1V reflect loss of lean tissue and fattening that accompanies the aging process. The d values of Group 11 are somewhat puzzling. This group does not have the muscular development, for example, of the older age Group 111, despite the increased weight of this group. each group except Group 1, is small, however. 30 men in each group. The number of individuals in There should be at least Nevertheless, there is no question about the excellent muscular development of Group 1. The relatively small ankles compared with Reference Man* may be a physical characteristic of the males of this race. * Reference (Military Man) Age group 20 - 24 years. Height 17.40 decimeters (68.5 inches ). Sum of 11 Circumferences = 600 F = 3.078 Sum 11 Circum./F Weight 70.0 = 194.9 d Values for Reference Man Shoulder (36.00), Biceps (10.32), Forearm (8.72), Wrist (5.62), Chest (29.84), Abdomen Avg. (25.49), Buttocks (30.36), Thigh (17.80), Knee (11.90), Calf (11.64), Ankle (7.31) 20604914