Fig. 8. Between-subjects variation in k. (A) While the LiMb model predicted over 90% of the variance in COL for each subject, differences in k, measured as the slope of the LSR for each subject, were marked. Data for two subjects are highlighted here against data from all subjects. (B) Predicted versus observed COL, using estimates of k derived for each subject. Line indicates LSR. open circles, walking trials (N=34, r²=0.95, P<0.01); filled circles, running trials (N=27, r²=0.87, P<0.01).