Fig. 3. LiMb model-predicted rate of force production (N kg^–1 s^–1) versus observed COL_walk (open circles) and COL_run (ml O₂ kg^–1 s^–1) (filled circles) for humans (N=10 subjects). This pattern is similar to that reported previously for a different group of humans (Pontzer, 2005). Broken lines indicate LSR for COL_walk and COL_run, solid line indicates LSR for all trials. LSR equations and coefficients of determination are given in the figure.