Fig. 3From: Is there a trade-off between economy and task goal variability in transfemoral amputee gait?Primary gait parameters. Standard deviations (A, B) for stride and step length (Ln) and time (Tn) as a function of walking speed from 0.6Â m/s to 1.4Â m/s. Error bars indicate between subject 95% confidence intervals at each speed. The SD of length and the SD of time in stride and step length linearly decreased along with speedBack to article page