Using vicon bodybuilder and plug-in-gait to generate L5/S1 angles, forces and moments

Stambolian, Damon; Asfour, Shihab; Eltoukhy, Moataz

doi:10.1109/aero.2014.6836487

Cited by 5 publications

(2 citation statements)

References 12 publications

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“…Thus, the peak L5–S1 moment observed in the whole lifting period and the average L5–S1 moment from the lifting and deposit phases were taken as the dependent variables accounting for the low back load. The kinetic performance of lumbar disks L5–S1 was calculated based on the modified plug-in gait model called S-model [ 21 ]. The force and moment of the joint L5–S1 were developed by inverse dynamics algorithms using ground reaction forces collected from the force plates and body kinematics collected from the motion capture system.…”

Section: Methodsmentioning

confidence: 99%

Influence of Load Knowledge on Biomechanics of Asymmetric Lifting

Liu

2022

IJERPH

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Background: Load knowledge has been identified as a factor affecting the risk of low back pain (LBP) during symmetric lifting. However, the effects of load knowledge in asymmetric lifting tasks have not been reported yet. The purpose of this study was to investigate the load knowledge influence on lifting biomechanics in asymmetric lifting tasks; Methods: Twenty-four male adults were recruited to complete a psychophysical lifting capacity test and a simulated asymmetric lifting task. The lifting task was set with load knowledge of ‘no knowledge’ (NK), ‘weight known’ (WK), ‘fragile material known’ (FK), and ‘weight and fragile material known’ (WFK) for different lifting load weights. Trunk kinematics and kinetics were collected and analyzed; Results: When fragility information was presented, trunk sagittal flexion acceleration, lateral flexion velocity and acceleration, and average lateral bending moment were significantly lowered at the deposit phase. Lifting a high load weight was found to significantly increase low back sagittal bending moment at the lifting phase and low back moments of all three dimensions at the deposit phase; Conclusions: The decrease of trunk kinematic load suggests that providing material fragility information to workers in asymmetric lifting tasks would be effective in reducing their risk of LBP.

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Section: Methodsmentioning

confidence: 99%

Influence of Load Knowledge on Biomechanics of Asymmetric Lifting

Liu

2022

IJERPH

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“…• The knee angle calculated from the commercial optoelectronic system was measured using the Plug-in Gait body model [32]. In this model the joint kinematics are obtained by combining marker positions with anthropometric measurements.…”

Section: Data Processingmentioning

confidence: 99%

Land and Underwater Gait Analysis Using Wearable IMU

et al. 2021

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Walking underwater reduces joint impacts, enhances stability and lowers the net body weight of the patient during rehabilitation. It is a recent rehabilitation method and few suitable methods exist to study underwater gait kinematics. We propose an underwater inertial measurement (IMU) system analogous to those used in land-based rehabilitation to investigate gait kinematics. The objective of this study was to test and validate the proposed system in two human trials by evaluating the knee angle during the gait. In the first trial, a three-way performance analysis was carried out between the IMU, optoelectronic and motion-capture systems in a traditional rehabilitation setting on land. In the second trial, the proposed underwater IMU is compared with camera-based motion-capture both inside and outside the water environment, using the same subjects in both phases of the trial. This allows for an evaluation of the walking gait in air and underwater as well as a cross-comparison of IMU-based knee angle estimates before and after Gaussian Process Regression. The major finding of this work is that the proposed underwater wearable IMU system provides reliable and repeatable measurements of the knee angle during the gait, both in air and underwater. Index Terms-gait analysis, inertial measurement unit (IMU), kinematics, rehabilitation, underwater, optoelectronic tracking, motion-capture I. INTRODUCTIONW ATER provides a nearly ideal environment for physical rehabilitation. This is due to the additional forces acting on the submerged body, primarily caused by the dynamic pressure and drag. These hydrodynamic forces reduce the net body weight, lower joint loading and provide enhanced physical support and posture stabilization [1], [2]. Walking rehabilitation in water, shown in Figure 1, affects the muscular skeletal system [2], by reducing fatigue and pain, improving the physical recovery rate as well as joint

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Influence of load knowledge on lifting biomechanics

Liu

2022

International Journal of Occupational Safety and Ergonomics

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Using vicon bodybuilder and plug-in-gait to generate L5/S1 angles, forces and moments

Cited by 5 publications

References 12 publications

Influence of Load Knowledge on Biomechanics of Asymmetric Lifting

Influence of Load Knowledge on Biomechanics of Asymmetric Lifting

Land and Underwater Gait Analysis Using Wearable IMU

Influence of load knowledge on lifting biomechanics

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