scholarly journals Prevalence of Musculoskeletal Disorders among Stone Polishing Workers using Stone Polishing Devices in Unorganized Sector of Guwahati (India)

2020 ◽  
Vol 9 (5) ◽  
pp. 140-142
Keyword(s):  
Whole Body ◽  
Sustained Load ◽  
Entire Body ◽  
Body Parts ◽  
Repetitive Motion ◽  
Long Duration ◽  
Guwahati City ◽  
Postural Load ◽  
Rapid Entire Body Assessment ◽  
Load Handling

Stone polishing is one of the prominent informal sector in India (and world as well), where a large number of stone polisher works for long duration. Stone polishing workers manually operate the polishing machine either in standing or sitting position to carry out polishing activities, and are quite prone to various MSDs (repetitive strain induced) and thereby injuries and accidents. The present research therefore intends to explore the occurrences of WMSDs among the stone-polishing workers, and with utmost attempt to put forward some recommendations regarding corrective measures. Thirty (30) male stone polishing workers were selected from the Guwahati city of Assam. A comprehensive study on discomfort feeling was carried out by the modified Nordic questionnaire which considered the information about work nature and job stress. Rapid Entire Body Assessment (REBA) method was followed to evaluate whole body postural load and risks associated with the job. The finding of the study contributes to the understanding of the working conditions of the stone polishing workers and their physical discomforts at various body parts (mainly the lower back, knees and shoulder) due to awkward posture, repetitive motion, force exertion and sustained load handling during polishing activities. To overcome the problem arisen from aforesaid ergonomic stressors associated with stone-polishing work, ergonomic design intervention pertaining to modification of the equipment / hand tool like handle design, easy manoeuvrability, avoiding hand-holding of weight etc. have been proposed

scholarly journals New Challenges Regarding the Intervention of Musculoskeletal Risk in Truck Service Garages

2021 ◽  
Vol 14 (1) ◽  
pp. 181
Author(s):  
Coral Oliver Hernández ◽  
Shimeng Li ◽  
María José Aguado Benedí ◽  
Inmaculada Mateo Rodríguez
Keyword(s):  
Musculoskeletal Disorders ◽  
Initial Assessment ◽  
Risk Level ◽  
Control Group ◽  
Entire Body ◽  
Course Of Action ◽  
Postural Load ◽  
Rapid Entire Body Assessment ◽  
Experimental Group ◽  
Postural Training

Background: The automotive industry is heavily affected by sick leaves caused by the handling of loads and using postures that produce musculoskeletal disorders. Research is needed to analyse their causes and find possible solutions to eliminate or mitigate these risks. Objective: Our objective was to analyse the level of musculoskeletal risk in the different work tasks performed by truck and bus mechanics. Our intention is also to analyse whether postural training and feedback can help reduce risk. Methods: The rapid entire body assessment (REBA) was used to assess the postures performed by 35 mechanics from eight branches throughout Spain. The participants were subsequently divided randomly into two groups (experimental group and control group). The experimental group (EG) was given training and feedback on their postures and the control group (CG) was not offered any type of intervention. A few months after the initial assessment, their postural load in the usual tasks was re-evaluated. Results: An overall average REBA Score: 10.49 ± 1.33. The main risk was found in the trunk and arms with sustained above-the-head postures. EG’s second results are significantly improved compared to the first (p = 0.026 *). Conclusions: These jobs have a high-risk level of musculoskeletal disorders. The course of action presented with postural training and feedback has shown satisfactory results. Nevertheless, given the size of the sample, further research will be needed to delve deeper into this possibility as a future line of intervention.

An appropriate biomechanical model of seated human subjects exposed to whole-body vibration

2021 ◽  
pp. 146441932110394
Author(s):  
Raj Desai ◽  
Anirban Guha ◽  
Pasumarthy Seshu
Keyword(s):  
Degrees Of Freedom ◽  
Human Subjects ◽  
Computational Cost ◽  
Biomechanical Model ◽  
Whole Body ◽  
Body Parts ◽  
Lumped Parameter ◽  
Long Duration ◽  
The One ◽  
The Right

Long duration automobile-induced vibration is the cause of many ailments to humans. Predicting and mitigating these vibrations through seat requires a good model of seated human body. A good model is the one that strikes the right balance between modelling difficulty and simulation results accuracy. Increasing the number of body parts which have been separately modelled and increasing the number of ways these parts are connected to each other increase the number of degrees of freedom of the entire model. A number of such models have been reported in the literature. These range from simple lumped parameter models with limited accuracy to advanced models with high computational cost. However, a systematic comparison of these models has not been reported till date. This work creates eight such models ranging from 8 to 26 degrees of freedom and tries to identify the model which strikes the right balance between modelling complexity and results accuracy. A comparison of the models’ prediction with experimental data published in the literature allows the identification of a 12 degree of freedom backrest supported model as optimum for modelling complexity and prediction accuracy.

scholarly journals Configuration Laptop Usage During Online Class: Effects on Posture and Discomfort Using the REBA Method

2021 ◽  
Vol 4 (2) ◽  
pp. 58-68
Author(s):  
Dian Palupi Restuputri ◽  
Rozza Badiiliana I ◽  
Fatimah Zahra Y ◽  
Nanindya Aisyah P ◽  
Fita Amalia ◽  
...  
Keyword(s):  
The Body ◽  
Risk Level ◽  
Entire Body ◽  
Body Parts ◽  
Online Class ◽  
Work Posture ◽  
Global Pandemic ◽  
Online Classrooms ◽  
Musculoskeletal Problems ◽  
Rapid Entire Body Assessment

COVID-19 has become a global pandemic, and one of the government's actions in the education sector to prevent transmission through online class activities or online classrooms has been adopted. During the pandemic, it was discovered that using computers with improper or non-ergonomic body postures during online classes might cause muscular fatigue and raise the incidence of musculoskeletal problems. Using the Rapid Entire Body Assessment (REBA) method, this study seeks to detect musculoskeletal complaints and assess the posture of UMM students when using a laptop. Because online learning lasts more than 2 hours, posture that is not in accordance with the comfort of using a laptop can lead a person to exhaust more rapidly in front of a laptop for a relatively long period, especially in the upper neck, back, and waist, which stand for 80% of the body parts. This is supported by the study of respondents using a questionnaire distribution technique that provided a REBA score of 7 and a moderate risk level, indicating that remedial action is required. After a recommended improvement with a low risk level for MSDs, a REBA score of 3 was established. Suggestions that can be considered are that it is necessary to improve sitting work posture, it is recommended to work on a table and sit in a reclining chair so that the proposed work posture improvement can be carried out.

scholarly journals Analisis tingkat risiko ergonomi pada pekerja Welding (Pengelasan) dengan Metode Rapid Entire Body Assessment (REBA)

2021 ◽  
Vol 1 (01) ◽  
pp. 28-34
Author(s):  
Dzikron Bahid M
Keyword(s):  
The Body ◽  
Risk Level ◽  
Entire Body ◽  
Body Parts ◽  
A Value ◽  
Group B ◽  
High Level ◽  
Almost All ◽  
Rapid Entire Body Assessment ◽  
Ergonomic Risk

Introduction: Diseases caused by work become a common health problem and can affect almost all people in the world. As you can see, one of the hazards in the field is ergonomics. The danger from bad posture at work is the cause of the position of the body parts moving uncomfortably which can cause various problems at work, both health problems and work accident problems. Therefore, so that a job does not pose a dangerous risk, it is necessary to have an assessment of ergonomic risk. Researchers aim to analyze the level of ergonomic risk to Welding workers with the Rapid Entire Body Assessment (REBA) Method in the Workshop area of PT. Cemindo Gemilang Bayah Banten in 2020. Methods: This research uses mix methods, which is a research step by combining two forms of research approaches, namely qualitative and quantitative. The subjects in this study were the main informants and key informants totaling 4 people. The main informants in this study were 3 welding workers. The key informant is 1 person, namely HSE. Results: The results of the risk level assessment using the REBA method for welding workers are obtained from the scoring of group A with a value of 8 and the results of scoring for group B with a value of 4, then the total results of C to the scoring of groups A and B have a value of 10. Discussion: Based on the Action Level Score, REBA score 10 shows a high level of risk. 3 people out of 4 workers are known to be at high risk of pain so further review and implementation of changes / immediate action are required.

scholarly journals Systematic Comparison of OWAS, RULA, and REBA Based on a Literature Review

2022 ◽  
Vol 19 (1) ◽  
pp. 595
Author(s):  
Dohyung Kee
Keyword(s):  
Literature Review ◽  
Entire Body ◽  
Observational Methods ◽  
Posture Analysis ◽  
Risk Levels ◽  
Working Posture ◽  
Postural Load ◽  
Analysis System ◽  
Rapid Entire Body Assessment ◽  
Time Limitations

This study aimed to systematically compare three representative observational methods for assessing musculoskeletal loadings and their association with musculoskeletal disorders (MSDs): Ovako Working Posture Analysis System (OWAS), Rapid Upper Limb Assessment (RULA), and Rapid Entire Body Assessment (REBA). The comparison was based on a literature review without time limitations and was conducted on various factors related to observational methods. The comparisons showed that although it has a significant limitation of comprising only two classifications for the leg postures, (1) the RULA is the most frequently used method among the three techniques; (2) many studies adopted the RULA even in evaluation of unstable lower limb postures; (3) the RULA assessed postural loads as higher risk levels in most studies reviewed in this research; (4) the intra- and inter-reliabilities for the RULA were not low; and (5) the risk levels assessed by the RULA were more significantly associated with postural load criteria such as discomfort, MHTs and % capable at the trunk, and MSDs.

Comparative Study of Rapid Upper Limb Assessment (RULA) and Rapid Entire Body Assessment (REBA) between Conventional and Machine Assisted Napier Grass Harvest Works

2015 ◽  
Vol 786 ◽  
pp. 275-280 ◽  
Author(s):  
Mohd Khairul Faizi Abd Rahman ◽  
A.B. Shahriman ◽  
Hazry Desa ◽  
Ruslizam Daud ◽  
Zuradzman Mohamad Razlan ◽  
...  
Keyword(s):  
Upper Limb ◽  
Low Cost ◽  
The Body ◽  
Napier Grass ◽  
Entire Body ◽  
Body Parts ◽  
Harvesting Method ◽  
Force Impact ◽  
Rapid Entire Body Assessment ◽  
Trunk Position

Most of Napier grass industry in Malaysia is labored in small and medium scale. Therefore, the harvesting works are done manually by man power using conventional equipment such as sickle and machete. However, there are some efforts made to design the low cost equipment in assisting this Napier grass harvesting works. The aim of this study is to compare the Rapid Upper Limb Assessment (RULA) and Rapid Entire Body Assessment (REBA) performance in order to evaluate the certain body parts condition during harvesting works by using conventional equipment and innovation machine assisted. Based on survey, conventional harvesting method might increase the risk of low back pain (LBP) due to repetitive stooping posture. Furthermore, the back biomechanical load and force impact were also not handling wisely. The objective of this study is to prove that the usage of machine during harvesting works might improve the body posture especially on stoop level condition. Based on results, the overall RULA and REBA score are excellently improved as well as trunk position which is depicts the stooped level condition. Hence, the innovation of harvest machine could contribute to the Napier grass industry especially on small and medium entrepreneur.

scholarly journals De Re Metallica: An Early Ergonomics Lesson Applied to Machine Design in the Renaissance

2021 ◽  
Vol 13 (17) ◽  
pp. 9984
Author(s):  
Francisco Javier Trujillo ◽  
Juan Claver ◽  
Lorenzo Sevilla ◽  
Miguel A. Sebastián
Keyword(s):  
Historical Context ◽  
Point Of View ◽  
Machine Design ◽  
Entire Body ◽  
Metal Mining ◽  
De Re ◽  
Repetitive Movements ◽  
Postural Load ◽  
Mechanical Devices ◽  
Rapid Entire Body Assessment

The Renaissance treatise De Re Metallica (Georgius Agricola, 1556) is one of the first works that deals in detail with the state of the art of metal mining, compiling the main techniques and mechanical devices used in this industrial activity at that time. An advanced knowledge of the human–machine set is observed in this treatise, from a mechanical and ergonomics point of view. The main objective of this work is to carry out an ergonomics analysis of one of the mechanical devices collected in the sixth book of this treatise. It is intended to show that there was a certain concern for ergonomics in the Renaissance, long before the first appearance of this concept. Specifically, a mine water extraction pump, powered by three different systems, is analyzed. Current ergonomics assessment methods have been used to perform this comparative analysis. The postural load has been assessed by the rapid upper limb assessment (RULA) and the rapid entire body assessment (REBA). The Check List OCRA (occupational repetitive action) has been used to perform the analysis of repetitive movements. The results have shown an evolution of the machine, not only on a mechanical level, but also in movements, postures, and safety of the operator for the three methods applied. It is, therefore, an example of practical and real ergonomics applied to machine design dating from the 16th century. In addition, this work may be a very interesting tool for teaching, since it allows showing examples of ergonomics in productive areas related to historical context.

scholarly journals An Overview of REBA Method Applications in the World

2020 ◽  
Vol 17 (8) ◽  
pp. 2635 ◽  
Author(s):  
Manuel Hita-Gutiérrez ◽  
Marta Gómez-Galán ◽  
Manuel Díaz-Pérez ◽  
Ángel-Jesús Callejón-Ferre
Keyword(s):  
Core Collection ◽  
Web Of Science ◽  
Assessment Method ◽  
Review Literature ◽  
Entire Body ◽  
Body Parts ◽  
The World ◽  
Improvement Measures ◽  
Rapid Entire Body Assessment ◽  
The Web

The objective of this work is to review literature, worldwide, in which the Rapid Entire Body Assessment (REBA) ergonomic assessment method was applied and count the number of times that REBA was applied together with other methods and subsequent incidence. The database used was the “Web of Science—Core Collection”. Only scientific articles and bibliographic reviews were included, analysing a total of 314 documents and selecting only 91. The use of the REBA method is indicated in terms of knowledge, country, year and journal sectors. It was most used in the knowledge areas of “Manufacturing” (24.18%), “Agriculture, forestry and fishing” (21.98%) and in “Other activities” (19.78%). One of the benefits of REBA is that it evaluates different body parts: upper limbs (arm, forearm and wrist), lower extremities, trunk and neck. It is a useful method to identify the forced postures adopted by workers to thus develop improvement measures if necessary. It is concluded that REBA method use has increased over the last decade, probably due to the digitization of knowledge. It is almost always applied in combination with other methods, and its use can be a positive indicator of company sustainability.

scholarly journals The contribution of stimulating multiple body parts simultaneously to the illusion of owning an entire artificial body

2020 ◽  
Author(s):  
Sophie H. O’Kane ◽  
H. Henrik Ehrsson
Keyword(s):  
Onset Time ◽  
Body Part ◽  
Whole Body ◽  
Multisensory Perception ◽  
Entire Body ◽  
Body Ownership ◽  
Body Parts ◽  
The Right ◽  
Three Body ◽  
Full Body

AbstractThe full-body ownership illusion exploits multisensory perception to induce a feeling of ownership for an entire artificial body. Whilst previous research has shown that the synchronous visuotactile stimulation of a single body part is sufficient for illusory ownership over the whole body, the effect of combining multisensory stimulation across multiple body parts remains unknown. Therefore, 48 healthy adults participated in conditions of a full-body ownership illusion involving synchronous or asynchronous visuotactile stimulation to one, two or three body parts simultaneously (2 x 3 design). We developed a novel questionnaire to isolate the sense of ownership of five specific body parts (left leg, right leg, left arm, right arm, and trunk) from the full-body ownership experience and sought not only to test for greater (part and whole) body ownership in synchronous versus asynchronous stimulation, but also, potentially varying degrees of illusion intensity related to the number of body parts stimulated. As expected, illusory full-body ownership and all five body-part ownership ratings were significantly higher following synchronous stimulation (all p values ≤.01). Since non-stimulated body parts also received significantly higher ownership ratings following synchronous stimulation, the results are consistent with an illusion engaging the entire body. We further noted that ownership ratings for the right body parts (often stimulated) were significantly higher than ownership ratings for the left body parts (never stimulated). Regarding explicit feelings of full-body ownership, subjective ratings were not significantly enhanced by increasing the number of synchronously stimulated body parts (synchronicity x number stimulated interaction; p.099). Instead, median ratings indicated a moderate affirmation (+1) of full-body illusory sensation for all three synchronous conditions; a finding mirrored by full-body illusion onset time. The results support the notion that feelings of full-body ownership are mediated by a generalisation from stimulated part(s)-to-whole, supported by processes related to multisensory body perception.

scholarly journals The contribution of stimulating multiple body parts simultaneously to the illusion of owning an entire artificial body

PLoS ONE ◽  
2021 ◽  
Vol 16 (1) ◽  
pp. e0233243
Author(s):  
Sophie H. O’Kane ◽  
H. Henrik Ehrsson
Keyword(s):  
Body Part ◽  
Whole Body ◽  
Multisensory Perception ◽  
Entire Body ◽  
Body Ownership ◽  
Body Parts ◽  
Body Sensation ◽  
Three Body ◽  
Mixed Modelling ◽  
Full Body

The full-body ownership illusion exploits multisensory perception to induce a feeling of ownership of an entire artificial body. Although previous research has shown that synchronous visuotactile stimulation of a single body part is sufficient for illusory ownership of the whole body, the effect of combining multisensory stimulation across multiple body parts remains unknown. Therefore, 48 healthy adults participated in a full-body ownership illusion with conditions involving synchronous (illusion) or asynchronous (control) visuotactile stimulation to one, two, or three body parts simultaneously (2×3 design). We used questionnaires to isolate illusory ownership of five specific body parts (left arm, right arm, trunk, left leg, right leg) from the full-body ownership experience and sought to test not only for increased ownership in synchronous versus asynchronous conditions but also for potentially varying degrees of full-body ownership illusion intensity related to the number of body parts stimulated. Illusory full-body ownership and all five body-part ownership ratings were significantly higher following synchronous stimulation than asynchronous stimulation (p-values < .01). Since non-stimulated body parts also received significantly increased ownership ratings following synchronous stimulation, the results are consistent with an illusion that engages the entire body. Furthermore, we noted that ownership ratings for right body parts (which were often but not always stimulated in this experiment) were significantly higher than ownership ratings for left body parts (which were never stimulated). Regarding the effect of stimulating multiple body parts simultaneously on explicit full-body ownership ratings, there was no evidence of a significant main effect of the number of stimulations (p = .850) or any significant interaction with stimulation synchronicity (p = .160), as assessed by linear mixed modelling. Instead, median ratings indicated a moderate affirmation (+1) of an illusory full-body sensation in all three synchronous conditions, a finding mirrored by comparable full-body illusion onset times. In sum, illusory full-body ownership appears to be an ‘all-or-nothing’ phenomenon and depends upon the synchronicity of visuotactile stimulation, irrespective of the number of stimulated body parts.

Sign in / Sign up

Export Citation Format

Share Document