Age related differences in mechanical demands imposed on the lower back by manual material handling tasks

2016 ◽  
Vol 49 (6) ◽  
pp. 896-903 ◽  
Author(s):  
Iman Shojaei ◽  
Milad Vazirian ◽  
Emily Croft ◽  
Maury A. Nussbaum ◽  
Babak Bazrgari
Keyword(s):  
Material Handling ◽  
Manual Material Handling ◽  
Lower Back ◽  
Age Related

scholarly journals SPACE MAPPING OF HIP AND WRISTS MOTIONS FOR DIFFERENT TRANSFER DISTANCES IN MANUAL MATERIAL HANDLING TASK

2020 ◽  
Vol 21 (2) ◽  
pp. 164-176
Author(s):  
Radin Zaid Radin Umar ◽  
Fatin Ayuni Mohd Azli Lee ◽  
Muhammad Naqiuddin Khafiz ◽  
Nadiah Ahmad ◽  
Nazreen Abdullasim
Keyword(s):  
Material Handling ◽  
Space Mapping ◽  
Material Transfer ◽  
Repetitive Lifting ◽  
Manual Material Handling ◽  
Lower Back ◽  
Occupational Settings ◽  
Lifting Task ◽  
Transfer Tasks ◽  
Male Subjects

Manual material transfer tasks are common in occupational settings. Repetitive lifting tasks usually involve twisting and bending which are associated with occupational lower back injuries. One of the approaches to reduce bending and twisting is to separate the distance between lifting origin and destination, which will encourage lifters to step and turn entire bodies. However, adding lifting distances is likely to affect space usages and requirements. A study was conducted to investigate how the transfer distances influence space usage during the lifting task. Raw data of hip and hand wrists motion of 26 male subjects during transfer in 4 different distances were captured using X-Sens motion capture system. MVN Studio software was used to process and extract positional data. Tabulated space mapping revealed limited hip movement and semicircular shaped hand motions for short transfer distances. The pattern changes into a more stretched-curve shape as the distance increases. Overall, it was observed that shorter transfer distance caused participants to adopt more twisting and less bending postures, while further transfer distances resulted in more bending and less twisting. This study may provide industrial practitioners with information to design a space requirement for manual material transfer tasks. ABSTRAK: Kerja-kerja pemindahan barang secara manual adalah biasa dalam persekitaran kerja. Kerja-kerja mengangkat barang yang kebiasaannya melibatkan badan membengkok dan berpusing boleh menyebabkan kecederaan tulang belakang. Salah satu cara bagi mengurangkan risiko ini adalah dengan memisahkan jarak antara tempat asal dan tempat tuju pemindahan barang. Pemindah barang digalakkan untuk melangkah dan memusingkan seluruh badan. Namun, cara ini menyebabkan penggunaan ruang yang banyak. Satu kajian telah dijalankan bagi mengkaji bagaimana jarak pemindahan barang mempengaruhi penggunaan ruang ketika kerja-kerja pemindahan. Data asal pergerakan pinggul dan pergelangan tangan daripada 26 subjek lelaki ketika pemindahan barang pada 4 jarak berbeza diperolehi menggunakan sistem rakaman gerakan X-Sens. Perisian MVN Studio digunakan bagi memproses dan mengekstrak data ini. Ruang pemetaan berjadual mendedahkan pergerakan pinggul yang terhad dan pergerakan tangan berbentuk separa bulat pada jarak pemindahan terdekat. Corak ini berubah kepada bentuk lengkung memanjang apabila jarak bertambah. Keseluruhannya, jarak pindahan yang kurang menyebabkan para peserta lebih terdedah kepada postur memusingkan badan berbanding membengkok, sementara jarak yang jauh menyebabkan peserta lebih membengkok berbanding memusingkan badan. Kajian ini memberikan maklumat untuk penggiat industri mereka cipta keperluan ruang bagi kerja-kerja pemindahan barang secara manual.

scholarly journals Reviewing interventions to enhance comfort and productivity of workers in Enterprises

2020 ◽  
Vol 15 (2) ◽  
pp. 419-423
Author(s):  
Ekta Melkani ◽  
Kiran Singh ◽  
Manju Mehta
Keyword(s):  
Musculoskeletal Disorders ◽  
Material Handling ◽  
Small Scale ◽  
Upper Limbs ◽  
Manual Material Handling ◽  
Lower Back ◽  
Ergonomic Interventions

The following study deals with the detailed reviews regarding the interventions that have been done globally in the sector of entrepreneurial interventions in aspect of work simplification. Various standards hence can be considered while referring to different designs for enterprises, especially small scale enterprises. The studies have revealed the musculoskeletal disorders from manual material handling (MMH) works often involving strains and sprains to the lower back, shoulders, and upper limbs. The ergonomic interventions are found to give comfort to the workers in various postures. It is concluded that the design of the system must be incorporating to the worker, equipment, and environment as a whole.

scholarly journals Forces Loaded on the Back of Manual Material Handling Tasks' Workers of Food Industries in Malard Using"3D Static Strength Prediction Program”

2018 ◽  
Author(s):  
Sayedtaghi MIRMOHAMMADI ◽  
Ali GHOLIZADEH ABBASABAD ◽  
Seyednourddin MOUSAVINASAB ◽  
Seyed Esmaeil HOSSEINI NEJAD ◽  
Homira ALIZADEH
Keyword(s):  
Musculoskeletal Disorders ◽  
Material Handling ◽  
Physical Workload ◽  
Shear Forces ◽  
Manual Lifting ◽  
Food Industries ◽  
Prediction Program ◽  
Manual Material Handling ◽  
Lower Back

Introduction: Manual Material Handling tasks can cause fatigue in the short term and increase physical workload and musculoskeletal injuries in the long term. The present study was conducted to determine the amount of forces entered to the lower back in workers with manual material handling tasks.Methods: This descriptive-analytic study was conducted on 100 workers in food industries in Malard city in 2017. The Nordic questionnaire was used to determine the frequency of musculoskeletal disorders. The 3DSSPP was also applied to determine the amount of forces entered to the lower back of manual material handling tasks workers. Data analysis was conducted using SPSS (version 23)Results: we found that 24percent of workers had discomfort in at least one of their nine musculoskeletal muscles. The results of 3DSSPP showed that 30 and 34 percent of the compressive forces entered into L5/S1 and L4/L5 discs, respectively. In addition, the shearing force loaded on the L5/S1 disc was also found to be higher than the permissible limit eight percent of the participants. No significant relationship was found between the frequency of musculoskeletal disorders and the amount of compressive and shear forces entered to the lower back of workers.Conclusion: Based on NIOSH  recommended limits, the amount of compressive and shear forces entered to the lower back in 3DSSPP showed that in 30 percent of manual lifting load tasks, the risk of injury to the lower back was moderate and this risk was low in 70 percent of tasks.

scholarly journals Evaluasi Aktivitas Manual Material Handling dan Penerapan K3 Bagian Palletizing Kemasan Jerigen di PT. XYZ

2020 ◽  
Vol 19 (1) ◽  
Author(s):  
Kusnadi Kusnadi ◽  
Aulia Fashanah Hadining ◽  
Wahyudin Wahyudin
Keyword(s):  
Working Conditions ◽  
Material Handling ◽  
Manual Lifting ◽  
Work Attitude ◽  
Manual Material Handling ◽  
Lower Back ◽  
Risk Of Injury ◽  
Work Posture ◽  
Line Section ◽  
Heavy Loads

<span lang="EN">Production results that are handled manually are lifting the burden of jerry cans weighing 24 kg from the conveyor to the pallet. This removal process is risky for musculoceletal and can cause lower back pain. The appointment process takes place in the packing line section D. The purpose of this study is to determine the level of risk, find out the form of conveyor in accordance with working conditions and provide recommendations for corrective actions to be taken when the operator's work attitude has the risk of injury. The assessment of work posture is based on the assessment of RULA for each part (upper arm, forearm, wrist, wrist rotation, back, neck, and leg position) which are then categorized based on the results of the grand score on the action level indicating that the posture is required repair or not. The results of this study found that 3 workers for the grand score of work posture an average of 7 which indicates the need for action now. This is influenced by heavy loads with manual lifting</span>.

scholarly journals Postural Analysis on Manual Pine Resin Collecting Work: Lifting Index and L5/S1 Compression-Shear Forces

2021 ◽  
Vol 9 (3) ◽  
pp. 368-378
Author(s):  
Efi Yuliati Yovi ◽  
Nasruli Awaliyah
Keyword(s):  
Injury Risk ◽  
Material Handling ◽  
Three Dimension ◽  
Shear Forces ◽  
Manual Lifting ◽  
Prediction Program ◽  
Manual Material Handling ◽  
Lower Back ◽  
Psychophysical Analysis ◽  
Postural Analysis

Even though pine oleoresin harvesting is labor-intensive forestry work involving manual material handling (especially lifting) and is massively carried out in Indonesia, there is a lack of ergonomics studies on manual pine oleoresin harvesting. This study focused on lifting-related postures in pine oleoresin harvesting. A Three Dimension Static Strength Prediction Program Version 7.1.0 was used to identify the injury risk on the lower back (lumbosacral joint, L5/S1) using biomechanical criteria (compression and shear forces) at extreme postures. Recommended Weight Limit (RWL) and Lifting Index (LI) were calculated for a comprehensive analysis. The exceeding compression and shear forces indicated that the L5/S1 injury risk on oleoresin collecting work (part of oleoresin harvesting) is high. The psychophysical analysis confirmed the findings, as several main postures in this work were categorized as intense manual lifting due to the excessive score of LI.  A significant reduction in the L5/S1 compression and shear forces were shown at a simulation using a proposed load threshold (using the calculated RWL). Keywords: biomechanics, ergonomics, forestry work, manual lifting, oleoresin harvesting

scholarly journals Analysis of Recommended Weight Limit to Mitigate the Lower Back Pain in Manual Material Handling Task

2011 ◽  
pp. 141-145
Author(s):  
Ajay Bangar ◽  
Vikrant Joshi ◽  
Neetu . Neetu . ◽  
K.C. Arora
Keyword(s):  
Back Pain ◽  
Lower Back Pain ◽  
Material Handling ◽  
Occupational Safety ◽  
Average Value ◽  
New Approaches ◽  
Manual Material Handling ◽  
Lower Back ◽  
Niosh Lifting Equation

In this paper Authors have tried to calculate the revised Recommended Weight Limit (RWL) on the basis of revised Load constant (LC), Horizontal Multiplier (HM), Vertical Multiplier (VM) which are calculated according to the collected data from industry. While their average value had been considered in National institute for occupational safety &health (NIOSH) lifting equation. Thought behind this was that person’s age, obesity and height can not be taken constant Authors have applied the new approaches for setting limits of LC, HM, VM for optimizing the value of RWL of workers who work in industry. The approach may probably lead to calculate the safe weight for lifting and lowering in manual material handling task. It is expected that such an approach may be more protective for workers in manual material handling.

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