Short Interventions to Prevent Trapezius Muscle Fatigue in Computer Work

2019 ◽  
Author(s):  
Keyword(s):  
Muscle Fatigue ◽  
Trapezius Muscle ◽  
Computer Work

Effect of Periodic Voluntary Interventions on Trapezius Activation and Fatigue During Light Upper Limb Activity

2021 ◽  
pp. 001872082110507
Author(s):  
Dongwon Kim ◽  
Corine Nicoletti ◽  
Subaryani D. H. Soedirdjo ◽  
Raziyeh Baghi ◽  
Maria-Gabriela Garcia ◽  
...  
Keyword(s):  
Muscle Fatigue ◽  
Muscle Activation ◽  
Temporal Distribution ◽  
Trapezius Muscle ◽  
Computer Work ◽  
3 Dimensional ◽  
Intervention Activity ◽  
Spatio Temporal ◽  
Voluntary Contractions ◽  
The Impact

Objective The effects of diverse periodic interventions on trapezius muscle fatigue and activity during a full day of computer work were investigated. Background Musculoskeletal disorders, including trapezius myalgia, may be associated with repeated exposure to prolonged low-level activity, even during light upper-extremity tasks including computer work. Methods Thirty healthy adults participated in a study that simulated two 6-hour workdays of computer work. One workday involved imposed periodic passive and active interventions aimed at disrupting trapezius contraction monotony (Intervention day), whereas the other workday did not (Control day). Trapezius muscle activity was quantified by the 3-dimensional acceleration of the jolt movement of the acromion produced by electrically induced muscle twitches. The spatio-temporal distribution of trapezius activity was measured through high-density surface electromyography (HD-EMG). Results The twitch acceleration magnitude in one direction was significantly different across measurement periods ( p = 0.0156) on Control day, whereas no significant differences in any direction were observed ( p > 0.05) on Intervention day. The HD-EMG from Intervention day showed that only significant voluntary muscle contractions (swing arms, Jacobson maneuver) induced a decrease in the muscle activation time and an increase in the spatial muscle activation areas ( p < 0.01). Conclusion Disruption of trapezius monotonous activity via brief voluntary contractions effectively modified the ensuing contraction pattern (twitch acceleration along one axis, active epochs reduction, and larger spatial distribution). The observed changes support an associated reduction of muscle fatigue. Application This study suggests that disruptive intervention activity is efficient in reducing the impact of trapezius muscle fatigue.

scholarly journals Reliability of Trapezius Muscle Hardness Measurement: A Comparison between Portable Muscle Hardness Meter and Ultrasound Strain Elastography

Sensors ◽  
2020 ◽  
Vol 20 (24) ◽  
pp. 7200
Author(s):  
Tomonori Sawada ◽  
Hiroki Okawara ◽  
Daisuke Nakashima ◽  
Shuhei Iwabuchi ◽  
Morio Matsumoto ◽  
...  
Keyword(s):  
Trapezius Muscle ◽  
Hardness Measurement ◽  
Strain Ratio ◽  
Muscle Stiffness ◽  
Computer Work ◽  
Shoulder Stiffness ◽  
Strain Elastography ◽  
Upper Trapezius ◽  
Muscle Hardness ◽  
Hardness Values

Prolonged computer work and smartphone use can cause stiffness of the neck and shoulder muscles, including the trapezius muscle. Hence, muscle hardness quantification is clinically beneficial. The present study aimed to examine the reliability of trapezius muscle hardness measurement using a portable muscle hardness meter and ultrasound strain elastography. Overall, 20 healthy young men participated in this study. Prior to measurement, the participant’s subjective symptoms, particularly shoulder muscle stiffness, were rated using an 11-point verbal scale. Furthermore, hardness of the right and left upper trapezius muscles was assessed. In the strain elastography assessment, muscle hardness was evaluated using strain ratio. Results showed that, in quantifying upper trapezius muscle hardness, both portable muscle hardness meter and strain elastography had an excellent intra-tester reliability (>0.9). However, the correlation coefficients between muscle hardness values assessed using a muscle hardness meter and those evaluated with strain elastography did not significantly differ, and the scores for subjective shoulder stiffness did not correspond to muscle hardness values. Therefore, the hardness of the trapezius muscle does not directly reflect the subjective shoulder stiffness. Future studies should thoroughly examine the location of the shoulder stiffness, and check whether it is accompanied by local pain or tenderness.

Mental stress and trapezius muscle activation under psychomotor challenge: A focus on EMG gaps during computer work

2008 ◽  
Vol 45 (3) ◽  
pp. 356-365 ◽  
Author(s):  
Lawrence M. Schleifer ◽  
Thomas W. Spalding ◽  
Scott E. Kerick ◽  
Jeffrey R. Cram ◽  
Ronald Ley ◽  
...  
Keyword(s):  
Mental Stress ◽  
Muscle Activation ◽  
Trapezius Muscle ◽  
Computer Work ◽  
Emg Gaps

On Study of Driver’s Shoulder Fatigue in Manual and Automatic on Grassland Highway

2014 ◽  
Vol 1030-1032 ◽  
pp. 2054-2060
Author(s):  
Xiao Jing Chen ◽  
Chun Hua Qi ◽  
Shou Lin Zhu ◽  
Ming Xing Gao ◽  
Feng Yang
Keyword(s):  
Operating System ◽  
Muscle Fatigue ◽  
Trapezius Muscle ◽  
Linear Structure ◽  
Frequency Domain Analysis ◽  
Static Test ◽  
Automatic Group ◽  
Shoulder Muscle ◽  
Before And After ◽  
Manual Group

On the grassland highway, the driver is prone to muscle fatigue because of the particularity of its landscape and the linear structure. And vehicle operating system leads to different degree of muscle fatigue. In order to explore the pilot fatigue characteristics in grassland under different operation conversion highway, put forward the fatigue improve measures and improving the quality of driving, I use the real driving test. In this paper, we study the manual and automatic driver’s shoulder muscle fatigue with method of frequency domain analysis through testing the driver, obtaining MF of trapezius muscle in static measurement and the surface electronical signal of the trapezius muscle after 110 minutes’ driving. We devide the drivers into 2 groups (5 drivers in manual group, 5 drivers in automatic group). The results show that the automatic driver’s MF has significantly negative correlation (P =- 0.521) before and after the static test, which suggests automatic driver will be afflicted with shoulder muscle fatigue; The manual drive’s MF before and after the test tends to decrease with time (SlopeMS =- 0.0076, SlopeMD =- 0.0582), which suggests that after test, drivers in manual group are in the right shoulder fatigue, and before test, the decline of MF shows the drivers’ fatigue accumulation. After test, MF of manual and automatic group increases (SlopeAD =- 0.01, SlopeMD =- 0.058), which shows that driving on grassland highway can lead to the driver’s muscle fatigue with the extension of time; and vehicle operating system leads to different degree of muscle fatigue.

Active pauses induce more variable electromyographic pattern of the trapezius muscle activity during computer work

2009 ◽  
Vol 19 (6) ◽  
pp. e430-e437 ◽  
Author(s):  
Afshin Samani ◽  
Andreas Holtermann ◽  
Karen Søgaard ◽  
Pascal Madeleine
Keyword(s):  
Muscle Activity ◽  
Trapezius Muscle ◽  
Computer Work
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