Fig. 4. Histogram of the percentage difference between the measured and allometrically predicted net cost of running (E_run) using (A) the animal data from Taylor et al. (Taylor et al., 1982) (N=95) and the allometric equation (Eqn 1) developed in their study (where E_run is computed using the slope method; see Materials and methods) and (B) 31 animals for which E_run was computed using the subtraction method and the allometric equation developed from these data (Eqn 2). The position of the mean human E_run based on the subtraction method from 20 previously published studies is represented by the black bars.