Figure 4.

SPM [t] Post hoc paired t-tests showing the effect of walking speed on asymmetry in posterior-anterior GRF (asymmetry: % BW) for uninjured control participants. For column 1, positive values represent higher posterior-anterior GRFs in the “injured” relative to the contralateral limb whereas negative values indicate lower vertical GRF’s in the “injured” relative to the contralateral limb. For each SPM [t] graph, the red dashed line corresponds to the critical t thresholds, denoted as t*. Any portion of the waveform exceeding this threshold (shaded in grey) indicates a significance difference between speeds at p < 0.05. Note that the limb that had lower peak vertical GRF during the self-selected walking speed condition was considered as the “injured limb” for the control participants. SS = Self-selected speed.