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. 2022 May 4;13:726677. doi: 10.3389/fphys.2022.726677

FIGURE 4.

FIGURE 4

Factor loadings of principal components from gait spatial features. Loading is the positive or negative correlation between a principal component and a variable. (A) Factor loadings of the first principal component, which is strongly and positively correlated to variables in the forward displacement (F1 to F3) and hence describes this displacement in the foot trajectory. (B) Factor loadings of the second principal component, which is strongly and positively correlated to variables in the vertical displacement (V1 to V3) and hence describes this displacement in the foot trajectory.