Data acquisition and processing

Standard gait analysis was collected using a motion-capture system that had 12 cameras (Raptor-4; Motion Analysis Corporation, Santa Rosa, CA, USA), five force platforms (three 40 × 60-cm Optima models; AMTI, Watertown, MA, USA; two 40 × 60-cm 9281EA models; Kistler, Winterthur, Switzerland) embedded in the floor. The kinematic data were acquired at 150 Hz, and the data on ground-reaction forces were acquired at 300 Hz using a motion-capture system (Cortex 6.0; Motion Analysis, Santa Rosa, CA, USA).

The data processing was performed using Cortex 6.0. Visual 3D software version 6.00.33 (C-motion Inc., Germantown, MD, USA) performed all kinematics and kinetics calculations. To enable users to process the data in the Visual 3D software, a Visual 3D pipeline file is available at Figshare. The analysis of the overground trials considered only those files that contained at least one full gait cycle (stance and swing phase) detected by kinematics. Heel strike and toe-off were calculated bilaterally using the horizontal velocity of the heel marker method (Zeni et al., 2008). The public data set consists of raw c3d and ASCII files containing 3D marker coordinates, angular kinematics, and external forces. In addition, time-normalized kinematic and kinetic average curves, which were considered processed data, were calculated for each participant.