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. Author manuscript; available in PMC: 2014 Jan 4.
Published in final edited form as: J Biomech. 2012 Nov 8;46(1):63–69. doi: 10.1016/j.jbiomech.2012.10.002

Fig. 3.

Fig. 3

Treadmill training protocol and outcomes. The beginning perturbation level was an acceleration of 12 m/s2 (Fig. 2c). When subject adapted successfully without landing the recovery foot posterior to the slipping foot in at least three out of those five trials (“Yes” or “Y”), the next perturbation level would go up by an increment of 2 m/s2 for another five trials. Otherwise (“No” or “N”) the perturbation level would decrease by a decrement of 4 m/s2. All possible outcomes are displayed in the dashed box. The numbers in the parentheses are the actual number of the subjects who adapted successfully at their corresponding highest perturbation level. The solid arrow indicates the adapted level that actually occurred in the training process; while the dashed arrow represents the possible perturbation level that never occurred during the actual training.