Fig. 1. Between-group comparisons of mass-specific power outputs in the ontogenetic sample of infant baboons. In all panels, Group 1 infants (filled circles) have significantly heavier distal limb segments than Group 2 infants (open circles). (A) Mass-specific internal power (_int) compared over the range of raw velocities. (B) Mass-specific _int compared over the range of dimensionless velocities. (C) Manipulation of _int calculations for Group 2 (see text for further explanation). (D) Mass-specific external power (_ext) compared over the range of raw velocities. (E) Mass-specific _ext compared over the range of dimensionless velocities. (F) Mass-specific total power (_tot) compared over the range of raw velocities. (G) Mass-specific _tot compared over the range of dimensionless velocities. Statistical between-group differences using ANCOVAs were found for B, D and F. These results can be found in Table 2.