Development and validation of a three dimensional dynamic biomechanical lifting model for lower back evaluation for careful box placement

Stambolian, Damon; Eltoukhy, Moataz; Asfour, Shihab

doi:10.1016/j.ergon.2015.12.005

Cited by 33 publications

(16 citation statements)

References 15 publications

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“…The initial computation of reaction forces using the simplified model that didn't take into account muscular force offered the maximum force at the knee joint contrary to AnyBody results. Validation for the AnyBody results was done by obtaining a set of maximum joint force data for the lumbosacral joint L5 -S1, which were compared to literature (Stambolian, 2016) conducting similar experiments for lower back evaluation, using the same AnyBody software. The computed results were also compared to data from literature studies (Hwang, 2009).…”

Section: Resultsmentioning

confidence: 99%

Biomechanics of Weightlifting

Abela¹,

Sant²

2020

Engineering Mechanics 2020

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Low back pain (LBP) is a common cause of job-related disability, usually related to idiopathic spine injury such as muscle sprain or so called 'slipped disc' due to lifting heavy object, which has around 80 % occurrence among injuries at the low back. That represents dual economical effect to society in form of reduced working force, and simultaneously the higher cost of the health care. In some cases the person face the risk to lose its job due to inability to carry heavy objects. Research already done doesn't suggest any solution how to prevent LBP and injuries. Ability to lift a heavy object has almost every healthy person but not all have the right physical condition to lift heavy objects. The presented work briefly shows the difference between two subjects with different physical background. Subject A represents the ordinary young lad visiting a gym while subject B represents young athlete with regular trainings for competition. Both subject had an experience with deadlifting, and were knowledgeable of the correct posture. Their lifting trials were recorded and processed to obtain forces, moments, angles, velocities, and acceleration of each segment of lower limb. An observation and some results are presented in this paper.

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Section: Resultsmentioning

confidence: 99%

Biomechanics of Weightlifting

Abela¹,

Sant²

2020

Engineering Mechanics 2020

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“…However, the reason for this behavior is not clear, and it is necessary to reveal the reason to improve the method of operation by lower limb movement. Thus, this study conducted musculoskeletal analysis for three-DOF position manipulation [22]- [23] and quantitatively evaluated the muscle load during operation by the lower limbs because the muscle load in the motion is assumed to be related to the abovementioned motion characteristics. Through the analysis, we clarified the specific leg motions that reduced the muscle load and investigated the reason for the observed motion characteristics by comparing them with the previous experimental results [21].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Effect of Motion Path on Leg Muscle Load and Evaluation of Device to Support Leg Motion During Robot Operation by Reducing Muscle Load

et al. 2021

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Because the human arm and leg have a similar skeletal structure, it may be possible to use the leg to operate a robot by the master-slave method. However, operation by the leg with six degrees of freedom has two problems. First, people move their ankle with a curved motion despite intending to move it linearly. Second, it is a burden for the operator to suspend their legs in the air during operation. This study dealt with these problems. For the first problem, we hypothesized that one of the reasons was that the muscle load of a curved motion was smaller than that of a linear motion, and we quantitatively compared them by musculoskeletal analysis. The muscle loads of curved motions were 20% smaller in the anteroposterior direction, 3.1% to 23.8% smaller in the lateral direction, and 10% smaller in the vertical direction than linear motions, which showed that the hypothesis was consistent. Further, comparison of the analysis results with the results of a previous study suggested that subjects unconsciously tried to reduce the muscle load and to move closer to a linear line when they moved their ankle while consciously intending to make a linear motion. For the second problem, we developed two different prototypes of a leg support device. An experiment to evaluate the effectiveness of these devices showed that subjective exercise intensity of the tasks in the experiment using the devices was 40% or more less than that without the device, which proved the effectiveness of the devices.

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“…Contudo, nem sempre é isso que acontece nas indústrias brasileiras -muitas vezes, o trabalhador se depara com a necessidade de adaptação ao seu ambiente de trabalho e/ou com a falta de descrição de como realizar sua tarefa adequadamente, o que pode acabar gerando riscos à sua segurança e à sua saúde. Moreira (2004) GRANDJEAN, 2005;AGNELLI et al;STAMBOLIAN et al, 2016;WATERS et al, 1993;LEE, 2016). do trabalhador e a fadiga física (IIDA, 2005).…”

Section: Introductionunclassified