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Substantive Issues in Running
Published in Christopher L. Vaughan, Biomechanics of Sport, 2020
Carol A. Putnam, John W. Kozey
While it is possible to debate the merits of force platform vs. accelerometer measurement techniques, it is clear that either one used in isolation will not provide information regarding joint, ligament, or tendon forces which presumably are necessary in order to relate running mechanics to injuries and injury mechanisms. Consequently, there is a need to combine this information with techniques such as cinematography to measure the kinematic parameters of the runner.
Case Studies
Published in Nicholas Stergiou, Nonlinear Analysis for Human Movement Variability, 2018
Anastasia Kyvelidou, Leslie M. Decker
One healthy control participant, 31 years of age (mass: 64.6 kg, height: 170.2 cm), and a 53-year-old (mass: 99.3 kg, height: 170.2 cm) patient with MS participated in this case study. Subjects stood quietly for 5 min with eyes open approximately 10 m from a wall, while COP data were collected. Feet were placed at approximately hip width apart, toes facing forward. Kinetic data were collected using a force platform (Kistler Model: 9281-B11; Amherst, NY; 10 Hz that was established based on pilot work). Unfiltered data were cropped to 2000 data points. Data were collected and analyzed unfiltered so as not to mask or remove any dynamical properties or variability present within the system.
Quantitative Measurement And Assessment Of Performance
Published in Raymond V. Smith, John H. Leslie, Rehabilitation Engineering, 2018
Body balance, which is actually a high-level task involving the coordination of multiple functional units and drawing upon their resources collectively, includes both one- and two- leg stability measures executed with the eyes either open or closed. An instrumented force platform is used to first monitor average lateral (sagital) and fore-aft (A-P) movement of the center of pressure on the platform from which measures of this aspect of the task are computed.26
The Effect of Additional Leg Supports in Control of Posture in Sitting
Published in Journal of Motor Behavior, 2023
Adeolu Ademiluyi, Huaqing Liang, Alexander S. Aruin
The experimental stool was positioned on the top of a force platform (Model OR-5, AMTI, USA). An accelerometer (Model 333B42, PCB Piezotronics, USA) with mass 7.5 g, sensitivity 51.0 mv/(m/s2) and a measurement range of ± 98 m/s2 pk was attached to the distal end of the pendulum and its signal was used to determine the moment of the pendulum impact (T0). Ground reaction forces and moments of force obtained from the force platform, EMG and accelerometer signals were synchronized and digitized with a 16-bit resolution at 1000 Hz by means of an analog-to-digital converter and a customized LabVIEW 8.6.1 program (National Instruments, Austin TX, USA). A computer with customized software based on LabVIEW 4.1 was used to control the experiment and collect the data.
Quiet standing postural control variables in subacute stroke: associations with gait and balance, falls prediction and responsiveness
Published in Disability and Rehabilitation, 2023
Kelly J. Bower, Shamala Thilarajah, Gavin Williams, Yong-Hao Pua, Dawn Tan, Ross A. Clark
Outcome measures in research and clinical practice are commonly employed to detect changes in performance over time or in response to interventions. Significant changes in COP variables have been demonstrated following balance training interventions in people with stroke [17,18]. Individuals undertaking post-stroke rehabilitation have also shown improvements in COP measures [e.g., 19,20], and this may be more pronounced in the mediolateral direction [6]. Specific information on balance deficits provided by COP variables may be useful to inform targeted training approaches and provide a sensitive measure to detect changes in balance. However, reliability studies of COP variables in people with stroke indicate that relatively large changes may be needed to be confident that true change has occurred, with minimal detectable change (MDC) in COP variable scores of between 38 and 52% [13,21,22]. Further, therapists have discussed the limitations in the feasibility of using force platform technologies when compared to tests requiring minimal time and equipment [23]. Alternative devices such as the Wii Balance Board (WBB), with greater portability and lower cost, may have increased clinical utility [24].
Long-term effects of mTBIs includes a higher dependency on visual inputs to control vertical posture
Published in Brain Injury, 2023
Alessander Danna-Dos-Santos, Patricia Driusso, Adriana Menezes Degani
A force platform (AMTI BP400600, AMTI Inc.) was used to acquire the vertical and horizontal components of the ground reaction force (GRF) as well as the moments of force around the frontal and sagittal axes. These signals were used for computations of the body’s center of pressure coordinates in the anterior-posterior and medial-lateral directions (COPap and COPml, respectively). Consistent with the manufacturer specification, COPap and COPml were defined by COPap =My/Fz and COPml =Mx/Fz, respectively. Fz is the vertical component of the GRF, Mx is the moment of force around the sagittal axis, and My is the moment of force around the frontal axis. All signals were sampled at 50 Hz with a 16-bit resolution. Prior to data recording, each participant went through a general neurological screening. They also filled the Neurobehavioral Symptom Inventory (NSI) survey to self-report current symptoms. Participants who met the established inclusion and exclusion criteria were eligible for the study and tested in an area free of noise and distractions.