Neck Disorders among Construction Workers: Understanding the Physical Loads on the Cervical Spine during Static Lifting Tasks

Nimbarte, Ashish D.; Aghazadeh, Fereydoun; Ikuma, Laura H.; Harvey, Catherine

doi:10.2486/indhealth.48.145

Cited by 56 publications

(36 citation statements)

References 29 publications

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“…The C4 level was determined as 2.5 times the distance between the C6-C7 vertebrae above the C7 level. The electrodes were placed parallel to the muscle fiber (approximately 35°to the vertical line between C7 and C4) (Nimbarte et al, 2010). The skin was prepared for electrode placement by shaving (if needed) and cleaning with 70% alcohol pads.…”

Section: Instrumentationmentioning

confidence: 99%

Cervical flexion–relaxation response to neck muscle fatigue in males and females

Nimbarte

Zreiqat

Chowdhury

2014

Journal of Electromyography and Kinesiology

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Section: Instrumentationmentioning

confidence: 99%

Cervical flexion–relaxation response to neck muscle fatigue in males and females

Nimbarte

Zreiqat

Chowdhury

2014

Journal of Electromyography and Kinesiology

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“…Since overuse may lead to muscle tear (Soslowsky et al 2002), many studies investigated the effect of overhead movements on shoulder muscle activation. Two kinds of overhead tasks have been studied: task in which hands are maintained over the head (Herberts et al 1984;Anton et al 2001;Sood, Nussbaum, and Hager 2007;Nimbarte et al 2010) and overhead lifting tasks (Yoon, Shiekhzadeh, and Nordin 2012). Concerning the former, most studies observed that prime movers of abduction and flexion are the most affected by the overhead position (Grieve and Dickerson 2008).…”

Section: Introductionmentioning

confidence: 98%

“…Herberts et al (1984) pointed out that a welder working in an overhead posture accumulates identifiable localised muscle fatigue in the supraspinatus and trapezius muscles. Moreover, increasing the mass of a box held at shoulder level with arms extended led to a greater activation of the upper trapezius and sternocleidomastoid muscles (Nimbarte et al 2010).…”

Section: Introductionmentioning

confidence: 99%

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Effects of height and load weight on shoulder muscle work during overhead lifting task

Blache¹,

Desmoulins²,

Allard³

et al. 2014

Ergonomics

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Few musculoskeletal models are available to assess shoulder deeper muscle demand during overhead lifting tasks. Our objective was to implement a musculoskeletal model to assess the effect of lifting height and load on shoulder muscle work. A musculoskeletal model scaled from 15 male subjects was used to calculate shoulder muscle work during six lifting tasks. Boxes containing three different loads (6, 12 and 18 kg) were lifted by the subjects from the waist to shoulder or eye level. After optimisation of the maximal isometric force of the model's muscles, the bio-fidelity of the model was improved by 19%. The latter was able to reproduce the subjects' lifting movements. Mechanical work of the rotator cuff muscles, upper trapezius and anterior deltoid was increased with lifting load and height augmentation. In conclusion, the use of a musculoskeletal model validated by electromyography enabled to evaluate the muscle demand of deep muscles during lifting tasks.

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“…A few previous studies have reported that approximately 50% of masonry/bricklayers complain of shoulder injuries due to repetitive handling of construction bricks/blocks [9 -11]. Several previous studies have already shown that physically demanding tasks such as heavy lifting, working at or above shoulder level, and repetitive movements are associated with low back pain [12][13][14][15][16][17][18] and shoulder pain [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Effects of lift-assist device on trunk and shoulder kinematics

Nimbarte

Chowdhury

Moore

2017

Int J Occup Safety & Health

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Abstract:Background: Repetitive handling of heavy concrete blocks has been associated with the risk of low back and shoulder injuries among the masons. Several interventions have been proposed to reduce the risk of musculoskeletal disorders among the masons. A new intervention, a lift-assist handle, was tested in this study. Objective: The effectiveness of the lift-assist handle in masonry work was assessed using the shoulder and low back kinematics during block lifting/lowering tasks performed at two heights. Methods: In a laboratory setting, seven male subjects performed with-and without-lift handle assisted block lifting tasks at two different heights. Optical motion capture system and biomechanical modeling software were used to record and model each dynamic trial. Effect of lifting height and use of a lift-assist handle on range of motion of the shoulder and trunk were tested. Results: The use of lift-assist handle significantly reduced trunk motion and increased shoulder motion. Lifting height had a significant effect on shoulder kinematics only. When height was increased from 17to 29 inches, the ranges of motion of shoulder abduction-adduction and internal rotation significantly increased. Additionally, block lifting/ lowering task duration decreased by 26% when the lift-assist handle was used. Conclusions: While potential benefits to lower back health were found with the lift-assist handle, increased shoulder motion may increase the risk of shoulder injuries. The findings of this study emphasize the need for an in-depth analysis of assistive devices prior to implementation to ensure that there are no unintended consequences of their use that could negate their benefit.

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Neck Disorders among Construction Workers: Understanding the Physical Loads on the Cervical Spine during Static Lifting Tasks

Cited by 56 publications

References 29 publications

Cervical flexion–relaxation response to neck muscle fatigue in males and females

Cervical flexion–relaxation response to neck muscle fatigue in males and females

Effects of height and load weight on shoulder muscle work during overhead lifting task

Effects of lift-assist device on trunk and shoulder kinematics

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