A New Approach to the Evaluation of Local Muscular Load while Typing on a Keyboard

Schlenker, Anna; Tichý, Tomáš

doi:10.21101/cejph.a5105

Cited by 2 publications

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References 1 publication

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“…The results of our study correspond to our expectations. They can be compared, for example, to a previous study on the evaluation of local muscle load during typing (11), where it has also been shown that the forces were above the limit, but in an average shift did not exceed the hygienic limit.…”

Section: S16mentioning

confidence: 99%

Assessment of local muscular load of dental practitioners

Schlenker

Kapitán

Vavřičková

et al. 2020

Cent Eur J Public Health

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Objective: Hands and forearms are one of the most common localisations of musculoskeletal disorders (MSDs) among dental practitioners. The aim of this study was to objectively assess the local muscular load of hands and forearms of dental practitioners during various treatment procedures using the method of the integrated electromyography (iEMG). This method is used for health risk assessment and categorization of working operation within the official national methodology. Methods: A total of 24 measurements were performed on 10 dental practitioners during 8 different dental treatments; mostly on those which are most frequent in clinical practice, i.e. endodontic treatment, tooth extraction, tooth restoration with filling and prosthetic treatment. The EMG Holter was used to detect the electromyographic potentials determining the local muscular load. Results: All the muscle groups of the forearm were relatively evenly loaded at work. During the dynamic work activity, the average time-weighted value of maximum voluntary contraction (%MVC) was in the range from 1 to 30 %MVC for all evaluated muscle groups. The mean average timeweighted value of %MVC did not exceed 6% (a critical limit of the mean average time-weighted value of %MVC) in any of the evaluated muscle groups. The results of the frequency analysis showed that large (55-70 %MVC) and rarely the limits exceeding values (above 70 %MVC) were observed for individual muscle groups. These forces are related to performing tasks at inaccessible locations associated with non-physiological working positions. The differences in the mean forearm muscle load between the upper limbs were statistically significant in total (p < 0.001), for flexors (p = 0.017) and for extensors (p = 0.006). Conclusion: In view of the results of this study, the work of dentists can be ranked in category 2 in terms of the local muscle load factor according to the currently valid legislation in the Czech Republic.

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Section: S16mentioning

confidence: 99%

Assessment of local muscular load of dental practitioners

Schlenker

Kapitán

Vavřičková

et al. 2020

Cent Eur J Public Health

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“…Compared to existing finger strength training devices, the training method in this study explicitly targets the finger force www.ijacsa.thesai.org direction and coordination required in office scenarios. Previous research has shown evidence that standard keyboards can improve the fine motor skills of the fingers when typing [34,35] and their coordination [36]. This training device adjusts the critical resistance and provides interactive feedback to facilitate finger movements.…”

Section: Training Methodsmentioning

confidence: 99%

AHP-based Design of a Finger Training Device for Stroke

Wei,

Luh,

et al. 2023

IJACSA

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This study aims to develop a stroke finger training device specifically for office hand scenes which exercises the small muscles of the fingertips and improves the hand strength of stroke patients. The device has a real-time recording function for muscle strength changes during finger muscle training and enhances interaction through the feedback of training device data, thereby improving training effectiveness. This research involves analyzing hand postures and muscle movements in computer office scenes, designing questionnaires to obtain user requirements, and using the Delphi analysis method to screen key indicators and form standards and program layers. The Analytic Hierarchy Process (AHP) evaluates and ranks the core design elements. According to the design elements, the structure and training system design are guided, and a prototype is built for experimental testing. The results show that the training device effectively improves participants' hand strength, stability, and coordination and helps restore hand function. The AHP method allows for evaluating and ranking the device's design elements, making the device design more reasonable and comprehensive. Overall, the training device significantly improves the finger muscle strength of participants.

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A New Approach to the Evaluation of Local Muscular Load while Typing on a Keyboard

Cited by 2 publications

References 1 publication

Assessment of local muscular load of dental practitioners

Assessment of local muscular load of dental practitioners

AHP-based Design of a Finger Training Device for Stroke

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