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Figure 12


Fig. 12. Results (factor scores) from principal components analyses (PCA) using 13 variables related to muscle function for the LG (A,B) and pMG (C,D) during walking (black circles) and running (red triangles). The top panels (A,C) show PC1 versus PC2, and the bottom panels (B,D) show PC1 versus PC3. Note that PC1 separated the two speeds for the LG, and PC3 separated the two speeds for the pMG. See Tables 2 and 3 for component loadings. For the LG, variables related to stress and force loaded strongly on PC1 whereas variables related to force and EMG duration loaded strongly on PC3 for the pMG.