The Role of Complex, Simultaneous Trunk Motions in the Risk of Occupation-Related Low Back Disorders

Fathallah, Fadi A.; Marras, William S.; Parnianpour, Mohamad

doi:10.1097/00007632-199805010-00014

Cited by 77 publications

(28 citation statements)

References 29 publications

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“…Our experimental set up was deliberately non-ergonomic, but unfortunately still reflects some real-life industrial work stations. Squatting to pick up loads is generally acknowledged as the correct technique to reduce the risk of back injury (Chaffin 1987, Mc Gill et al 1996, Fathallah et al 1998, Chaffin et al1999. However, this technique also involves considerable movement of the trunk and requires a whole-body upwards thrust to return to the upright position.…”

Section: Motor Capacities Adaptation and Lower Limbsmentioning

confidence: 99%

Motor adaptation capacity as a function of age in carrying out a repetitive assembly task at imposed work paces

Gilles¹,

Guélin²,

Desbrosses³

et al. 2017

Applied Ergonomics

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. Motor adaptation capacity as a function of age in carrying out a repetitive assembly task at imposed work paces. Applied Ergonomics, Elsevier, 2017, 64, pp.47-55. 10 AbstractThe working population is getting older. Workers must adapt to changing conditions to respond to the efforts required by the tasks they have to perform. In this laboratory-based study, we investigated the capacities of motor adaptation as a function of age and work pace. Two phases were identified in the task performed: a collection phase, involving dominant use of the lower limbs; and an assembly phase, involving bi-manual motor skills. Results showed that senior workers were mainly limited during the collection phase, whereas they had less difficulty completing the assembly phase. However, senior workers did increase the vertical force applied while assembling parts, whatever the work pace. In younger and middle-aged subjects, vertical force was increased only for the faster pace. Older workers could adapt to perform repetitive tasks under different time constraints, but adaptation required greater effort than for younger workers. These results point towards a higher risk of developing musculoskeletal disorders among seniors.

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Section: Motor Capacities Adaptation and Lower Limbsmentioning

confidence: 99%

Motor adaptation capacity as a function of age in carrying out a repetitive assembly task at imposed work paces

Gilles¹,

Guélin²,

Desbrosses³

et al. 2017

Applied Ergonomics

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show abstract

“…Hwang et al [8] have reported increases in the lumbar extension moment and lower trunk muscle activities with increase in the weight of lifted load. Increased trunk moment has been reported to be related to the increased muscle activation and increased 3 dimensional spinal loads [9][10][11][12][13]. Marras and Mirka [10] have reported increased muscle activation and spinal loads with increase in the trunk velocity.…”

Section: Materials and Methods Subjectsmentioning

confidence: 99%

Effects of external loading on lumbar extension moment during squat lifting

Vahdat

Rostami

Ghomsheh

et al. 2017

Int J Occup Med Environ Health

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Objectives:The main objective of this study has been qualitative investigation of the effects of external loading on the lumbar extension moment during squat lifting. Findings of this study may allow to determine the factor with the most considerable effect on the lumbar extension moment and may help determine the lumbar spine risk factors at temporo-spatial coordination during squat lifting. Material and Methods: Twelve healthy men volunteered to perform slow and fast squat lifting of a box of varied mass (4 kg, 8 kg and 12 kg). The eight-channel electromyography was applied to detect the activities of abdominal (rectus abdominis and external oblique) and lower back muscles (iliocostalis lumborum and multifidus). The lumbar extension moment was calculated using 3D linked segment model. Ground reaction forces and kinematic data were recorded using a Vicon system with 2 parallel Kistler force-plates. Results: Significant increases (both p-values < 0.05) were detected for the peak lumbar extension moment with increases in the lift speed and box weight. Moreover, a significant interaction (p = 0) was detected between the lift speed and box weight. Furthermore, insignificant differences (all p-values > 0.05) were detected between the lumbar angles related to the lower trunk muscles peak activities and lumbar angle related to the peak lumbar extension moment in most of the lifts. Conclusions: According to the findings, the inertial force of the lifted box is the most important factor that affects the lumbar extension moment during squat lifting. Moreover, critical lumbar angles are seemingly those ones in which the lifted box reaches the peak acceleration. Int J Occup Med Environ Health 2017;30(4):665-679

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“…Others have shown the importance of trunk muscle coactivation in providing stiffness and dynamic trunk stability to protect the spine from injury. 59,62 This dynamic stability controls excessive or poorly controlled trunk motion following perturbation 14,29,31,32,142 and attenuates the sudden forces that contribute to low back 48,60 and lower extremity pain and injury. 28,70,141,142 Volleyball players are at risk for sustaining both acute and chronic back injury.…”

Section: Level 5 J Orthop Sportsmentioning

confidence: 99%

“…1 Low back injury risk increases with spinal twisting, lateral bending, and asymmetrical movements. 3,48 The "trunk" refers to the body region excluding the head, neck, and extremities. The most important trunk muscle function is to provide dynamic stability.…”

mentioning

confidence: 99%

Dynamic Trunk Stabilization: A Conceptual Back Injury Prevention Program for Volleyball Athletes

Smith¹,

Nyland²,

Caudill³

et al. 2008

J Orthop Sports Phys Ther

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The Role of Complex, Simultaneous Trunk Motions in the Risk of Occupation-Related Low Back Disorders

Cited by 77 publications

References 29 publications

Motor adaptation capacity as a function of age in carrying out a repetitive assembly task at imposed work paces

Motor adaptation capacity as a function of age in carrying out a repetitive assembly task at imposed work paces

Effects of external loading on lumbar extension moment during squat lifting

Dynamic Trunk Stabilization: A Conceptual Back Injury Prevention Program for Volleyball Athletes

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