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Figure 2


Fig. 2. Double logarithmic plot of the net energy cost of running (Erun) versus body mass for humans and other mammalian and avian species. The shaded circles represent human data from 20 previously published sources (calculated from the subtraction method; see Materials and methods) (Table 1B), and the solid circle represents the mean value from these studies. The solid diamonds represent the other animals (see Table 3) used to generate the allometric equation for Erun using the subtraction method (Eqn 2). The solid line corresponds to the predicted Erun from this equation. For comparison, we have included the data points used by Taylor et al. (Taylor et al., 1982) (shaded diamonds; used to generate their allometric equation for Erun (Eqn 1; slope method). The broken line corresponds to the predicted Erun from Eqn 1.





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