Effect of mental and physical demands on muscular activity during the use of a computer mouse and a keyboard

Laursen, Bjarne; Jensen, Bente Rona; Garde, Anne Helene; Jørgensen, Anker Helms

doi:10.5271/sjweh.668

Cited by 118 publications

(101 citation statements)

References 26 publications

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“…Even for the most common muscle studied which is the trapezius muscle, the effect of stress on muscle activity can be divided into two main groups. One group found that when a certain psychosocial stress exists, the trapezius muscle will become affected and the muscle activity will be increased significantly [8,12,18,21,[29][30][31]35]. On the other hand, another group of researchers found that the existence of a certain psychosocial stress did not have any significant effect on trapezius muscle activity [9,14,18,19,23,24,27,28].…”

Section: Discussionmentioning

confidence: 99%

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The effect of psychosocial stress on muscle activity during computer work: Comparative study between desktop computer and mobile computing products

Taib

Bahn

Yun

2016

WOR

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Abstract. BACKGROUND:The popularity of mobile computing products is well known. Thus, it is crucial to evaluate their contribution to musculoskeletal disorders during computer usage under both comfortable and stressful environments. OBJECTIVE: This study explores the effect of different computer products' usages with different tasks used to induce psychosocial stress on muscle activity. METHODS: Fourteen male subjects performed computer tasks: sixteen combinations of four different computer products with four different tasks used to induce stress. Electromyography for four muscles on the forearm, shoulder and neck regions and task performances were recorded. RESULTS: The increment of trapezius muscle activity was dependent on the task used to induce the stress where a higher level of stress made a greater increment. However, this relationship was not found in the other three muscles. Besides that, compared to desktop and laptop use, the lowest activity for all muscles was obtained during the use of a tablet or smart phone. The best net performance was obtained in a comfortable environment. However, during stressful conditions, the best performance can be obtained using the device that a user is most comfortable with or has the most experience with. CONCLUSIONS: Different computer products and different levels of stress play a big role in muscle activity during computer work. Both of these factors must be taken into account in order to reduce the occurrence of musculoskeletal disorders or problems.

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Section: Discussionmentioning

confidence: 99%

“…The distance used between recording areas was 20 millimeters [31,32]. The skin was prepared by cleaning the located area.…”

Section: Electromyography (Emg) and Maximum Voluntary Contractions (Mvc)mentioning

confidence: 99%

The effect of psychosocial stress on muscle activity during computer work: Comparative study between desktop computer and mobile computing products

Taib

Bahn

Yun

2016

WOR

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“…3. A Stroop colour word stress task (Laursen et al, 2002;Stroop, 1935), where the name of a colour appeared approximately once a second at a random place on the computer screen. By clicking on the correct of four icon alternatives with the computer mouse, the subjects were asked to respond in which colour the word was written.…”

Section: Protocolmentioning

confidence: 99%

Trapezius muscle rest time during standardised computer work – A comparison of female computer users with and without self-reported neck/shoulder complaints

Thorn

Søgaard

Kallenberg

et al. 2007

Journal of Electromyography and Kinesiology

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Work related musculoskeletal disorders (WMSDs) in the shoulder/neck area are a common and increasing problem among European computer workers, especially women. Long-term low-level workloads with low degree of muscle rest are a potential risk factor for developing WMSDs. The purpose of the present study of female computer users (age 45-65 years) in Denmark and Sweden was to investigate if subjects with self-reported neck/shoulder complaints (cases, N = 35) show less trapezius muscle relative rest time (RRT) than controls (N = 44) when performing standardised short-term computer work tasks in controlled laboratory conditions. Surface electromyography (EMG) signals were recorded bilaterally from the upper trapezius muscles during a type, edit, precision and colour word stress task. Besides RRT, 10th percentile RMS values were calculated. On the average, 15 of the cases and 18 of the controls showed analysable EMG files per task. For the colour word stress task, the results showed lower RRT values and higher 10th percentile RMS amplitude levels among cases compared to controls. No such signs could be found for the other tasks performed. The present results indicate an increased motor response to a psychological stressor among subjects with self-reported neck/shoulder complaints.

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“…New computer systems imply a considerable increase in mouse use. Compared with the keyboard, mouse operations lead to higher demands on eye-hand coordination and a stronger visual focus on the screen (8), which, in turn, may imply more constrained postures (9). In addition, there is a higher load on the forearm muscles (9).…”

mentioning

confidence: 99%

Follow-up study of musculoskeletal disorders 20 months after the introduction of a mouse-based computer system

Arvidsson¹,

Axmon²,

Skerfving³

2008

Scand J Work Environ Health

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Effect of mental and physical demands on muscular activity during the use of a computer mouse and a keyboard

Cited by 118 publications

References 26 publications

The effect of psychosocial stress on muscle activity during computer work: Comparative study between desktop computer and mobile computing products

The effect of psychosocial stress on muscle activity during computer work: Comparative study between desktop computer and mobile computing products

Trapezius muscle rest time during standardised computer work – A comparison of female computer users with and without self-reported neck/shoulder complaints

Follow-up study of musculoskeletal disorders 20 months after the introduction of a mouse-based computer system

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