In the symmetry prediction outcomes, the symmetry of KFM explained more than 87% of the variance in the variable. The effect of the uncommon walking subject was also trivial, so the exclusion of the subject did not change the results. Specifically, the symmetry of vGRF was substantially affected by the uncommon walking subject. The subject caused strongly biased gait variables and abnormally increased adj. R2 up to 0.919.  By removing the subject, adj. R2 was adjusted by 0.547.