Figure 5. Hip and knee joint power on the prosthesis side.

(a) Hip joint power versus percent stride. Lines indicate average trajectories for each condition, with darker lines corresponding to conditions with higher prosthesis push-off work. (b) Hip joint work rate during push-off and early swing, or the H3 region⁹ indicated by green shading, decreased with increased prosthetic ankle push-off work. (c) Knee joint power versus percent stride. (d) Negative work at the knee joint during swing initiation, or the K3 region⁹ indicated by red shading, showed a trend toward increasing in magnitude with increasing prosthetic ankle push-off work. Error bars indicate inter-subject standard deviation, and *s indicate statistical significance.