A ground-reaction force platform (Balance-X-Sensor®, Soehnle Professional GmbH, Murrhardt, Germany) was used for assessment of static postural balance.
Foot contact corresponds to the time when loading of the vertical ground reaction force on the target force platform reaches more than 1% of a subject's body weight.
SiliconCoach Pro7 ® (Siliconcoach Ltd ,Dunedin, New Zealand), was used for video analysis with initial contact and toe-off identified from the vertical ground reaction force measure from the platforms (>10 N and <10 N respectively).
Ground reaction force will be measured using four force platforms aligned in series and sampling at 1200 Hz.
Ground reaction force will be collected with two force platforms (Kistler AG, Winterthur, Switzerland) and AMTI Advanced Mechanical Technology , Inc, Watertown, MA), synchronized with the motion capture system.
For this purpose ground reaction force (GRF) was measured by means of a piezoelectric force platform during the sit-to-stand (STS) movement, until a steady state erect posture was achieved.
A force platform (Kistler AG, Winterthur, Switzerland) will collect ground reaction force data at a frequency of 2400 Hz as the participant walks along the runway.
A force-platform mounted in the floor collected ground reaction force data (at 100 Hz) for the lead-foot contact onto the floor.
Vertical ground reaction force (GRF) data was obtained while subjects walked across a 6-component force platform (Bertec Corp ,Worthington) at 1000 Hz.
The protocol included a sit-to-stand (STS) task leading to erect posture on a piezoelectric force platform (Kistler, Switzerland, 960 Hz), in order to measure ground reaction force (GRF).
The model is evaluated in simulation and a physical robotic platform by analyzing the kinematics and ground reaction force.
