“…To ensure safety, a fabric belt 7 cm wide was placed around each subject's waist, for easy grasp by a research assistant who walked beside the walkway, slightly behind the subjects, during all trials. Stride time in both walking conditions was determined during steady-state walking using a GAITRite ® -System (GAITRite Gold, CIR Systems, PA, USA), (20,22,28,29), consisting of a 10-m long carpet with an integrated, pressure-sensitive electronic surface of 7.32 x 0.61 m connected to a personal portable computer via an interface cable. The pressure-sensitive surface includes a series of sensors (total 13,824) placed every 1.27 cm, with their centers placed in a 48 x 288 grid, and activated by mechanical pressure.…”