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. Author manuscript; available in PMC: 2011 Sep 17.
Published in final edited form as: J Biomech. 2010 Jun 9;43(13):2548–2553. doi: 10.1016/j.jbiomech.2010.05.015

Figure 1.

Figure 1

Experimental set up for target presentation during walking. Subjects matched velocity (V) and step frequency (SF) targets simultaneously while walking along a 7-m walkway. Velocity target was provided by flags attached to a rope loop running parallel to the length of the walkway and being driven at a constant velocity by a motor. Step frequency was provided by an audible metronome. Step length (SL) was also constrained because V = SL*SF.