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Fig. 6. Box-and-whisker plots of net mediolateral impulse for each substrate and
extremity group. The line in the middle of each box plot represents the
median; each box and each whisker corresponds to a fourth of the data;
asterisks designate outliers; circle denotes extreme outliers. Positive values
indicate a medially directed limb force [laterally directed substrate reaction
force (SRF)], and negative values indicate a laterally directed limb force.
Substrates were significantly different (N=75,
P<0.00001), but there were no differences between limbs within
substrate groups.