Effects of vibration push force, exposure duration and working posture on operators performing a grinding task

Muzammil, Mohammad; Rai, Ranvir Singh; Ahmad, Saman; Hasan, Fazil

doi:10.3233/oer-2010-0178

Cited by 4 publications

(3 citation statements)

References 31 publications

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“…A total of 36 studies were considered suitable for full‐text appraisal. Of these, 14 studies (Goodwin et al ., ; Jennings et al ., ; Rittweger et al ., ; Madhavan et al ., ,b; Mester et al ., ; Mileva et al ., ; Da Silva et al ., ; Lohman et al ., ; Cochrane et al ., ; Otsuki et al ., ; Zheng et al ., ; Muzammil et al ., ; Figueroa et al ., ) were excluded with reasons provided in Fig. .…”

Section: Resultsmentioning

confidence: 99%

Effect of vibration on muscle perfusion: a systematic review

Fuller

Thomson

Howe

et al. 2012

Clin Physio Funct Imaging

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Vibration has become of increasing interest to health professionals, primarily owing to reports that vibration can increase tissue blood flow. The aim of this review was to investigate the available scientific evidence on the effects of exogenous vibration on skeletal muscle perfusion. The databases searched from inception to December 2010 included Ovid MEDLINE, EMBASE, CINAHL via EbscoHost and CENTRAL. Experimental and observational studies, where exogenous vibration was an intervention, were included in this review. The main outcomes of interest were muscle blood volume, blood flow, blood flow velocity, arterial diameter and muscle temperature. One reviewer selected studies for inclusion, extracted data and assessed the quality of the eligible studies. Percentage change in muscle perfusion outcome was the measure of treatment effect, and regression analysis was used to investigate associations between vibratory load and muscle perfusion. Twenty-two studies with a total of 302 participants were included in this review. Muscle blood volume increased with vibration in five of nine studies and decreased in two studies; muscle blood flow velocity increased with vibration in five of six studies; muscle blood flow increased with vibration in two of three studies; vibration had a positive effect on arterial diameter in three of three studies; vibration had no effect on muscle temperature in two of two studies. The magnitude of increase in muscle perfusion was positively associated with vibratory load (P<0·001). We conclude that vibration increases muscle perfusion with the magnitude of increase positively related to the vibratory load applied.

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Section: Resultsmentioning

confidence: 99%

Effect of vibration on muscle perfusion: a systematic review

Fuller

Thomson

Howe

et al. 2012

Clin Physio Funct Imaging

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“…Deterioration of handgrip capacity is an indication of the development of musculoskeletal diseases of the upper extremity [40]. Several studies [41][42][43] have shown that workers subjected to vibratory hand tools suffer from pain, muscle weakness, resulting in musculoskeletal disorders due to diminished grip ability, fatigue, and reduced performance.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Effect of Handle Vibration Diesel-Fueled Single-Axle Tractor on Handgrip Strength of Operators

Busse¹,

Sinclair²,

Wondimu³

et al. 2020

Preprint

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Background: The transmission of vibration from a single-axis tractor to the human body is determined by its dynamic response; this, in turn, depends on the physical characteristics of a person's hand, the contact area, the strength of the grip, the push force of the tractor, and the position. The purpose of this work was to measure and evaluate handgrip strength and fatigue resistance for operators of a 15 horsepower single-axle tractor before and after vibration exposure. Methods: Grip strength of dominant and non-dominant hands before and after 30 minutes of tilling operations was measured and recorded. The operators performed tilling tasks with the tractor in third gear, while the vibration levels were measured at the tractor handle along with the vertical, forward, and transverse directions. Results: The average operator grip strength was 33.6 ± 2.7 and 26.3 ± 3.3 kg and the average overall grip strength declined from 39.7 to 29.31 kg, although the average fatigue strength was 27.6 and 26.5 seconds for the dominant hand before and after vibration exposure. For the non-dominant hand, the mean grip strength measured was 28.7±2.9 and 23.1±1.9 kg and the maximum grip strength was 32.79 and 26.25, while fatigue was 29.76 and 22 seconds before and after tilling respectively.Conclusion: The average reduction in grip strength suggest considerable differences in grip strength for dominant and non-dominant hands of single axle tractor operators and shows that vibration transmitted from the single axle tractor handle has a major effect on the operators.

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“…Upright postures and angle grinders with as little weight as possible result in the lowest disc pressures and low recovery times. A study on the superposed loads of work tasks, posture, vibration, and work duration is available from Muzammil M, et al [7]. Using 30 male subjects, blood pressure and heart rate were examined.…”

Section: Overview Of Technical and Ergonomic Angle Grinder Studiesmentioning

confidence: 99%

Case Studies on the Body Postures and Technical Design of Small Angle Grinders

Landau¹

2022

EOIJ

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Our case studies refer to small angle grinders. Work tasks, physical stresses during use, and stresses on the hand-arm system are discussed. For this purpose, a survey was administered to 42 work persons from four different industries. Angle grinders were the most important hand tools for the respondents. They used angle grinders for eight activities (from flexing to polishing). In addition, 17 detailed video analyses of the work processes with 5 different angle grinder makes were carried out in selected workshops. The survey results on working postures in the last week as well as within the last year indicated mainly bent and twisted trunk postures, squatting and kneeling at work. To that extent, these results correspond with the OWAS studies by Ellegast R, et al. The video studies pointed out the very frequent twisted or bent hand-arm postures. The (ergonomically recommended) alignment of tool axis and hand-arm axis is not possible when using angle grinders. Nevertheless, the vast majority of our test subjects are satisfied with the dimensions and characteristics of small angle grinders. The analysis results are transferred into a list of ergonomic requirements for product designers.

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Effects of vibration push force, exposure duration and working posture on operators performing a grinding task

Cited by 4 publications

References 31 publications

Effect of vibration on muscle perfusion: a systematic review

Effect of vibration on muscle perfusion: a systematic review

Evaluation of Effect of Handle Vibration Diesel-Fueled Single-Axle Tractor on Handgrip Strength of Operators

Case Studies on the Body Postures and Technical Design of Small Angle Grinders

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