Biomechanical assessment: propulsion outcomes
Locomotor biomechanics were examined during treadmill walking using an 18-camera motion capture system (Oqus, Qualysis, Gottenburg, Sweden; 200 Hz) and a force plate-embedded treadmill (Bertec, Columbus, Ohio, USA; 2000 Hz). Study participants walked on a treadmill set at their fast walking speed, defined as 115% of their comfortable walking speed on the treadmill. Walking assessments were speed-matched across the baseline and post-training timepoints. Out of 4 min of walking, the last 30 s of walking data were used for all analyses. From 3D motion analysis, we obtained peak paretic propulsion, defined as the peak of the anterior ground reaction force (percent body weight, [%bw]), and its associated metrics of ankle torque (Nm/kg), trailing limb angle (degrees) [