A second, independent motion capturing system with ten Bonita cameras (Vicon Motion System Ltd., LA, USA) was installed for the assessment of whole-body movement. Two general retro-reflective markers (Ø16 mm, Vicon Motion System Ltd., LA, USA) were attached to the skin of the left and right posterior superior iliac spine (PSIS). The trajectories of these two markers were sampled at 100 Hz for all subjects. Ground reaction forces during walking on the walkway were recorded at 1000 Hz with a force plate system (AMTI OR6-5, Watertown, MA, USA). The two motion capturing systems were synchronized by an external trigger.
Or6 5
Manufactured by Amti
Sourced in United States
The OR6-5 is a laboratory equipment designed for general research and experimental purposes. It serves as a versatile tool for various applications. The core function of the OR6-5 is to provide a stable and controlled environment for conducting scientific investigations. Further details on the intended use or specific applications are not available.
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Lab products found in correlation
4 protocols using or6 5
1
Whole-Body Motion Capture and Ground Reaction Force Analysis
2
Overground Walking Biomechanics at Self-Selected Pace
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These data came from a public dataset on overground walking, the details of which can be found in the original open source publication [18 (link)]. Fifty participants performed unshod walking on a 10-m level walkway across two in-ground force plates (1500 Hz, OR6-5, AMTI, USA), and motion was captured with 10 opto-electronic cameras (100 Hz, OQUS4, Qualisys, Sweden). Participants were instructed to walk at five speeds: 0–0.4 m/s1, 0.4–0.8 m/s, 0.8–1.2 m/s, self-selected spontaneous, and fast speeds. Only data from the self-selected spontaneous speed condition were extracted from the present analysis. Walking speed was extracted by the mean anterior velocity of the modelled COM during the periods when the participant was walking over the force plates. Marker trajectories and GRF data were low passed filtered (4th Order, zero-lag, Butterworth), at 6Hz and 18Hz, respectively. A 12-segment full body, 6DOF joint model was developed in Visual 3D software (C-motion Inc., Germantown, MD, USA). A force plate threshold of 20N was used to determine gait events of initial contact and toe-off. Two participants were excluded after exploratory plots of the raw power waveforms revealed larger outlier values relative to the participants across all four studies.
3
Gait Analysis with Motion Capture and Force Platforms
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The subjects wore the same tight shorts and sneakers. Sixteen marks were pasted strictly in accordance with Plug-in Gait requirements (Kadaba et al., 1990 (link)). The motion capture system using 12 cameras (Vicon, Oxford Metrics Limited, United Kingdom) was used to collect kinematic data at a sampling frequency of 100 Hz. Two force platforms (OR-65, AMTI, United States) were used to record ground reaction force (GRF) data at a sampling frequency of 1.5 kHz. At the beginning of the experiment, the subjects walked back and forth on a fixed path.
4
Reliability of Jump Performance Measures
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All jumps were performed on an AMTI force platform (AMTI OR6-5), mounted flush with the surrounding laboratory floor. Data were collected with the system sampling at 1000 Hz. Force-time traces were real-time displayed and saved with the use of computer software (AMTI NetForce 2.4.0, Watertown, MA) for further analysis. Reliability of this particular force platform had previously been established (Comyns et al., 2006 (link)). A pilot study was conducted to assess reliability of the testing procedures. For the pilot study participants were asked to complete eight consecutive CMJs or SJs (three baseline, followed by five minutes rest, followed by one at each of the testing rest intervals). The intraclass correlation coefficients (ICC) of these jumps were then analyzed for all trials for both jumps to confirm reliability and that there would be no potentiation or fatigue effect on each jump from the performance of the preceding jumps during the experiment. The reported ICCs were as follows: CMJ: ICC = 0.951; SJ: ICC = 0.961. The coefficient of variation for all trials for the pilot CMJ and SJ were 3.3% and 3.8%, respectively. These results would indicate that any changes in jump performance were due to the gluteal warm-up intervention.
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