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10 results for “ground reaction forces”
Can a knee sleeve influence ground reaction forces and knee joint power during a step-down hop in participants following ACL reconstruction? Discrete and time-continuous datasets
<p>Using a cross-over design, we estimated GRF and knee kinematics and kinetics during a step-down hop for 30 participants (age 26.1 [SD 6.7] years, 14 women) following ACL reconstruction (median 16 months post-surgery) with and without wearing a knee sleeve. In a subsequent randomised clinical trial, participants in the ‘Sleeve Group’ (n=9) then wore the sleeve for 6 weeks at least 1 hour daily, while a ‘Control Group’ (n=9) did not wear the sleeve. Statistical parametric mapping (SPM) was used to compare (1) GRF trajectories in the three planes as well as knee joint power between three conditions at baseline (uninjured side, unsleeved injured and sleeved injured side); (2) within-participant changes for GRF and knee joint power trajectories from baseline to follow-up between groups. We also compared discrete peak GRFs and power, rate of (vertical) force development, and mean knee joint power in the first 5% of stance phase. Time-continuous and discrete data are included in this dataset.</p>
Predicting continuous ground reaction forces from accelerometers during uphill and downhill running: A recurrent neural network solution
<p>Data and model files supporting the manuscript: </p> <p>Predicting continuous ground reaction forces from accelerometers during uphill and downhill running: A recurrent neural network solution.</p> <p>Repository: https://github.com/alcantarar/Recurrent_GRF_Prediction</p>
Raw data accompanying: Ground reaction forces in monitor lizards (Varanidae) and the scaling of locomotion in sprawling tetrapods
<p>Geometric scaling predicts a major challenge for legged, terrestrial locomotion.<b> </b>Locomotor support requirements scale identically with body mass (α M<sup>1</sup>), while force generation capacity should scale α M<sup>2/3</sup> as it depends on muscle cross-sectional area. Mammals compensate with more upright limb postures at larger sizes, but it remains unknown how sprawling tetrapods deal with this challenge. Varanid lizards are an ideal group to address this question because they cover an enormous body size range while maintaining a similar bent-limb posture and body proportions. This study reports the scaling of ground reaction forces and duty factor for varanid lizards ranging from 7 g 37 kg. Impulses (force x time) scaled roughly as predicted by the inverted pendulum model (α M<sup>0.99-1.34</sup>) while peak forces (α M<sup>0.73-1.00</sup>) scaled higher than expected. Duty factor scaled α M<sup>0.04 </sup>and was higher for the hindlimb than the forelimb. The proportion of vertical impulse to total impulse increased with body size, and impulses decreased while peak forces increased with speed. These results provide valuable data into how locomotor forces vary with body size and suggest how other, extinct, sprawling tetrapods may have dealt with the biomechanical challenges associated with generating sufficient locomotor forces at larger body sizes.</p>
Muscle activity, ground reaction forces and pointing performance during postural control tasks in healthy adults
<p>To investigate the muscle coordination during postural control, we recorded muscle activity and postural dynamics in healthy human adults. Fourteen participants performed postural tasks in which postural stability and pointing behaviour was varied. The data set contains electromyography of 36 muscles distributed across the body and ground reaction forces recorded during postural control tasks. A full factorial design was used. Stability was either not challenged or challenged in the anterior-posterior or medial-lateral direction. In addition, participants were asked to either relax their arms or to perform an unimanual or a bimanual pointing task. In the pointing task, participants held a laser pointer and pointed it on a target in front of them. Pointing performance was recorded using a video recording of the laser beam on the target area.</p> <p>InformationData.pdf – Description of data acquisition and file structure<br> EMG.zip – EMG data<br> FP.zip – Force plate data<br> Video.zip – Video feed</p>
Ground reaction force metrics are not strongly correlated with tibial bone load when running across speeds and slopes: implications for science, sport and wearable tech
<p>An interactive user interface and the raw data from the manuscript titled: "Ground reaction force metrics are not strongly correlated with tibial bone load when running across speeds and slopes: implications for science, sport and wearable tech". </p>
Raw data accompanying: Ground reaction forces in monitor lizards (Varanidae) and the scaling of locomotion in sprawling tetrapods
Open the record for dataset details and reuse information.
Estimating Running Ground Reaction Forces from Plantar Pressure during Graded Running Dataset
<p>Ground reaction force predictions, models, and ground truth measurements.</p>
Pelvic Belt Effects on Osseous Anatomy, Muscule Activation and Ground Reaction Forces
ClinicalTrials.gov study NCT02027038. IPD Sharing: Not stated. Countries: 0. Publications: 1.
3D ground reaction force data of walking individuals crossing the vibration-prone experimental pedestrian bridge HUMVIB, Darmstadt, Germany
<p>This data set is obtained within the framework of the DFG research project HUMVIB (Project number 446124066) to investigate human-induced vibrations and human-structure interaction on pedestrian bridges. In total, a set of data from 26 subjects for different walking step frequencies was investigated. Each condition was performed on the vibration-prone HUMVIB Bridge at the Lichtwiese campus of the Technical University of Darmstadt with a vertical natural frequency of 2.02 Hz. Each condition was also performed for the system configuration with the optional center support and consequently much higher frequency of 7.72 Hz. Thereby, each condition was repeated for 10 crossings and with each run 5 single steps were recorded by portable Ground Reaction Force Plates (GRFPs). In this case, the sensor plan <a href="https://zenodo.org/api/records/14049724/draft/files/02_HUMVIB_Bridge_with_GRFP.pdf/content" target="_blank" rel="noopener noreferrer">02_HUMVIB_Bridge_with_GRFP.pdf</a> shows that FP1, FP2, FP4, FP5 and FP6 are hit when crossing a bridge. Therefore, under these walking conditions, FP3 only records the mass inertia due to the bridge acceleration or noisy zero signals as a reference.</p> <p>The measured 3D ground reaction forces have been time-synchronized and measured with a sampling rate of 1,000 Hz. Complementary sensors on the structural response (accelerometers, strain gauges, ...) as well as on the subjects themselves (EMG sensors and MoCap) are less relevant for the analysis of the GRFs and will be published as a supplement after the analysis is completed. However, since FP3 is not hidden by a step of the walking subjects, it can also serve as a structural response sensor and thus not only provide the mass inertia but also the structural acceleration of the bridge. The dataset is well suited for the analysis of GRFs as a function of the tuning or structural acceleration between excitation and natural frequencies of walking individuals on vibration-prone structures. Furthermore, based on the given personal characteristics (height, weight, gender, age), an estimation of the influence of the personal parameters is possible. Finally, based on the size of the sample, the inter- and intra-variability of the persons walking can be investigated for verticals but also horizontal GRFs in general.</p>
Quantification of Distribution of the Mass Center for a Controlled Force Platform Reaction to the Ground
ClinicalTrials.gov study NCT03526198. IPD Sharing: NO. Countries: 0. Publications: 0.
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