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. Author manuscript; available in PMC: 2021 Mar 24.
Published in final edited form as: IEEE Trans Neural Syst Rehabil Eng. 2021 Mar 2;29:468–477. doi: 10.1109/TNSRE.2021.3057054

Fig. 1. Recumbent stepper and perturbations.

Fig. 1.

a. The recumbent stepper is a one-degree-of-freedom arm-leg exercise device. b. Perturbations were applied either at the extension-onset or mid-extension of the targeted leg. Perturbations were increased stepping resistance for 200 milliseconds. c. The experiment included four tasks. Each task had three ordered blocks, pre, perturbed stepping, and post. The perturbed stepping block also included random no-perturbation catch strides.