The effect of grip force, stroke rotation and frequency on discomfort for a torqueing tasks

Bano, Farheen; Mallick, Zulqernian; Khan, Abid Ali

doi:10.3233/wor-152146

Cited by 3 publications

(2 citation statements)

References 49 publications

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“…The variables such as root mean square (RMS) of the selected data points were computed from the data pad setup within the Lab Chart software. However, before commencing the actual weaving task, the participants underwent two maximum voluntary isometric contraction (MVIC) exercises, namely, maximum handgrip strength (Bano, Mallick, & Khan, ; Bhardwaj & Khan, ) and forearm supported manual resistance test (Konrad, ; Rota, Rogowski, Champely, & Hautier, ; Souza et al, ). These exercises activate forearm flexors/extensors muscles.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, the EMG data were normalized to the value during the maximum voluntary contraction (Ball & Scurr, ). The EMG raw RMS data was transformed into useful normalized EMG (NEMG) data using the formula (Bano et al, ) given below.

normalN normalo normalr normalm normala normall normali normalz normale normald normalE normalM normalG true(% true) = \frac{{(normalR normalM S_{normalE normalM normalG})}_{i} - {(R M {normalS}_{E M G})}_{m i n}}{{(normalR normalM S_{normalE normalM normalG})}_{m a x} - {(R M {normalS}_{E M G})}_{m i n}} \times 100,

where EMG is the electromyography; (RMS EMG ) i is the EMG RMS of the participant i during the task; (RMS EMG ) min is the EMG RMS during rest; (RMS EMG ) max is the maximum EMG RMS during isometric muscle contraction exercise.…”

Section: Methodsmentioning

confidence: 99%

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Application of multiple‐response optimization methods for the ergonomic evaluation of carpet weaving knife

Singh

Meena

Chaudhary

2019

Hum Ftrs & Erg Mfg Svc

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The aim of this study is to evaluate several weaving knife configurations in response to multiple criteria's for optimum design. Nine different knife combinations were tested over ten female weavers in a field experiment. Three levels of blade width and angular orientations were taken as the independent variables. Output response about goniometry and electromyography were taken as dependent variables. Multivariate analysis was carried out to estimate the effect of independent variables on output responses. To tackle the difficulty of knife selection with several output responses, three multicriteria optimization approaches have been compared. Multivariate analysis of variance results showed that the effect of both blade width and angle were significant at wrist angles. Also, the magnitude of effect size on both blade width and the angle was highest for the wrist angles. Despite the same weighing criteria, a slight difference was evident between the ranks from optimization methods. The higher blade widths and smaller angular orientations should be recommended for reduction of wrist deviation and muscle activity during weaving. The best possible combination of knife evaluated using multicriteria optimization was 25 mm × 100°. K E Y W O R D S carpet weaving, design ergonomics, electromyography, goniometry, maximum voluntary isometric contractions, multiple-criteria decision-making, Taguchi loss function, technique for order of preference by similarity to ideal solution, VIšekriterijumsko KOmpromisno Rangiranje, weaving knife, wrist posture

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Section: Methodsmentioning

confidence: 99%

normalN normalo normalr normalm normala normall normali normalz normale normald normalE normalM normalG true(% true) = \frac{{(normalR normalM S_{normalE normalM normalG})}_{i} - {(R M {normalS}_{E M G})}_{m i n}}{{(normalR normalM S_{normalE normalM normalG})}_{m a x} - {(R M {normalS}_{E M G})}_{m i n}} \times 100,

Section: Methodsmentioning

confidence: 99%

Application of multiple‐response optimization methods for the ergonomic evaluation of carpet weaving knife

Singh

Meena

Chaudhary

2019

Hum Ftrs & Erg Mfg Svc

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Design and Preliminary Validation of Grasp Assistive Device for an Industrial Environment

Loewen

Chandrashekar

2022

Journal of Medical Devices

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Carpal tunnel syndrome and tendonitis are two common upper extremity cumulative trauma disorders (CTD) related to repetitive and forceful activities in industrial environments. Reducing the muscular force during activities such as the operation of a pistol grip hand tool could result in lower incidence of CTDs. The objective of this research was to reduce the muscular contribution to the grip force using an active orthosis system. A novel soft, pneumatic grasp assist device, that used a unique design of sinusoidal bellows oriented at 45 degrees, was designed to augment the users' strength during operation of pistol grip hand tool. The optimized design was fabricated using rapid prototyping. Device effectiveness was quantified by measuring muscle activity and grip force during an in vivo study of a common industrial activity. Nine subjects experienced with power tools employed by an automobile manufacturer installed 18 fasteners using a pistol grip DC tool with and without the grasp assist device. Surface electromyography (sEMG) was used to measure the activity of four muscles commonly associated with grasping. Results showed that the grasp assist significantly reduced the mean, combined, normalized muscle activity by 18% (p<0.05). Muscle activation results were contextualized using the revised strain index (RSI). The grasp assist device trial yielded a significantly lower mean RSI value than the typical trial by 13% (p<0.05). The study showed that using an active grasp assist orthosis could reduce the incidence of CTDs in able bodied industrial workers using DC hand tools.

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Comparison of the strength endurance parameters for the Baltimore Therapeutic Equipment (BTE) Simulator II and the Jamar Handgrip Dynamometer

Myers

Triscari

2017

WOR

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The findings indicate that the 30% MVC may be a reliable baseline for grip strength endurance testing following the BTE Simulator II protocol. This suggests that the BTE Simulator II's endurance protocol may be a useful tool to document client progression during rehabilitation after sustaining an upper extremity dysfunction. Further research is needed to validate this protocol using different populations.

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The effect of grip force, stroke rotation and frequency on discomfort for a torqueing tasks

Abstract: It was found that stroke rotation for the torqueing tasks must be kept below 45°. It was concluded that it is important to control stroke rotation to improve performance of repetitive torqueing activity.

Cited by 3 publications

References 49 publications

Application of multiple‐response optimization methods for the ergonomic evaluation of carpet weaving knife

Application of multiple‐response optimization methods for the ergonomic evaluation of carpet weaving knife

Design and Preliminary Validation of Grasp Assistive Device for an Industrial Environment

Comparison of the strength endurance parameters for the Baltimore Therapeutic Equipment (BTE) Simulator II and the Jamar Handgrip Dynamometer

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