Datora monitora novietošanas pozīcijas ietekme uz m.sternocleidomastoideus biomehāniskajiem parametriem
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Date
2021
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Rīgas Stradiņa universitāte
Rīga Stradiņš University
Rīga Stradiņš University
Abstract
Ievads. Ņemot vērā to, ka cilvēki aizvien vairāk laika pavada strādājot pie datora monitoriem (gan saistībā ar tehnoloģiju attīstību, gan attālināto darbu), ir svarīgi zināt, kā pareizi to darīt, lai pēc iespējas mazinātu šī darba ietekmi uz darbinieku veselību. Tā kā sāpes mugurkaula kakla daļā biežāk sastopamas darbiniekiem, kas ikdienā strādā pie datora, salīdzinot ar pārējo populāciju, ir svarīgi noskaidrot, kādā pozīcijā novietot datora monitoru, lai pēc iespējas samazinātu kakla muskuļu noslodzi.
Darba mērķis. Izpētīt, kādā galvas pozīcijā, skatoties uz datora monitoru, galvas grozītājmuskuļa jeb m.sternocleidomastoideus (SCM) biomehāniskie parametri ir visoptimālākie.
Materiāli un metodes. Pētījumā piedalījās 41 dalībnieks. Visiem dalībniekiem tika veikta SCM biomehānisko parametru mērīšana dažādās galvas pozīcijās, izmantojot miotonometru. Datu apkopošana, apstrāde un statistiskā analīze veikta programmās Microsoft Excel un IBM SPSS Statistics 23.0.
Rezultāti. Augstākā SCM oscilāciju frekvence jeb muskuļa saspringums tika novērots pie leņķa +60° (vidējā frekvence 17,5 Hz (CI 17,0-18,1), mediāna 17,4 Hz (IQR 15,7-19,0)), bet zemākais – pie -30° (vidējā frekvence 12,3 Hz (CI 12,1-12,5), mediāna 12,2 Hz (IQR 11,8-13,0)). Muskuļa dinamiskā stīvuma jeb cietības lielākā vērtība bija pie galvas leņķa +60° (vidējā 314,0 N/m (CI 295,2-332,0), mediāna 301,5 N/m (IQR 245,8-345,5)), bet zemākā pie -30° (vidējā 185,5 N/m (CI 180,0-191,1), mediāna 184,0 N/m (IQR 166,9- 204,0)).
Tika atrasta pozitīva korelācija starp galvas pozīciju un muskuļa saspringumu (rs=0,76, p<0,001) un starp galvas pozīciju un muskuļa cietību (rs =0,65, p<0,001). Tika atrasta negatīva korelācija (rs =-0,12, p=0,02) starp SCM saspringumu un dalībnieku ĶMI.
Secinājumi. Vismazākais SCM saspringums un cietība tika novērota pie galvas pozīcijas -30°C, kas liecina par to, ka, attiecībā uz SCM biomehāniskajiem parametriem, šī pozīcija būtu visoptimālākā datora monitora novietošanai. Dalībniekiem ar augstāku ĶMI tika novērots mazāks SCM saspringums.
Introduction. Considering that people more often spend their workday sitting in front of their computer monitor (which is associated with technology development and with working from home), it is important to know how to do it right to minimize impact on employees’ health as much as possible. As neck pain is more common in employees’ working on computer compared to the rest of the population, it is important to find out in which position to place computer monitor to minimise neck muscle load. Objectives. To find out in which head position or head angle looking at the computer monitor the biomechanical parameters of SCM demonstrate the most optimal values. Materials and methods. A total of 41 people participated in the study. All participants were measured for SCM biomechanical parameters at different head angles using myotonometer. Collection, processing, and statistical analysis of data was performed with Microsoft Excel and IBM SPSS Statistics 23.0 programs. Results. The highest SCM muscle oscillation frequency value or muscle tension was at angle +60° where mean was 17.5 Hz (CI 17.0-18.1) and median was 17.4 Hz (IQR 15.7-19.0), but the lowest at -30°, where mean value was 12.3 Hz (CI 12.1-12.5) and median was 12.2 Hz (IQR 11.8-13.0). The highest SCM dynamic stiffness value was at +60° with mean 314.0 N/m (CI 295.2-332.0) and median 301.5 N/m (IQR 245.8-345.5), but the lowest at -30° with mean value 185.5 N/m (CI 180.0-191.1) and median 184.0 N/m (IQR 166.9- 204.0). There was a positive correlation between angle (head position) and muscle tension (oscillation frequency) (rs =0.76, p<0.001,) and between angle and muscle stiffness (rs =0.65, p<0.001). There was negative correlation between muscle tension (oscillation frequency) and patients BMI (rs =-0.12, p=0.02). Conclusions. The lowest SCM tension and stiffness values was observed at head angle +30°, indicating that this position would be the most optimal for the positioning of the computer monitor for SCM biomechanical parameters. Lower SCM tension was observed in participants with higher BMI.
Introduction. Considering that people more often spend their workday sitting in front of their computer monitor (which is associated with technology development and with working from home), it is important to know how to do it right to minimize impact on employees’ health as much as possible. As neck pain is more common in employees’ working on computer compared to the rest of the population, it is important to find out in which position to place computer monitor to minimise neck muscle load. Objectives. To find out in which head position or head angle looking at the computer monitor the biomechanical parameters of SCM demonstrate the most optimal values. Materials and methods. A total of 41 people participated in the study. All participants were measured for SCM biomechanical parameters at different head angles using myotonometer. Collection, processing, and statistical analysis of data was performed with Microsoft Excel and IBM SPSS Statistics 23.0 programs. Results. The highest SCM muscle oscillation frequency value or muscle tension was at angle +60° where mean was 17.5 Hz (CI 17.0-18.1) and median was 17.4 Hz (IQR 15.7-19.0), but the lowest at -30°, where mean value was 12.3 Hz (CI 12.1-12.5) and median was 12.2 Hz (IQR 11.8-13.0). The highest SCM dynamic stiffness value was at +60° with mean 314.0 N/m (CI 295.2-332.0) and median 301.5 N/m (IQR 245.8-345.5), but the lowest at -30° with mean value 185.5 N/m (CI 180.0-191.1) and median 184.0 N/m (IQR 166.9- 204.0). There was a positive correlation between angle (head position) and muscle tension (oscillation frequency) (rs =0.76, p<0.001,) and between angle and muscle stiffness (rs =0.65, p<0.001). There was negative correlation between muscle tension (oscillation frequency) and patients BMI (rs =-0.12, p=0.02). Conclusions. The lowest SCM tension and stiffness values was observed at head angle +30°, indicating that this position would be the most optimal for the positioning of the computer monitor for SCM biomechanical parameters. Lower SCM tension was observed in participants with higher BMI.
Description
Medicīna
Medicine
Veselības aprūpe
Health Care
Medicine
Veselības aprūpe
Health Care
Keywords
M.sternocleidomastoideus, miotonometrs, biomehāniskie parametri, monitora pozicionēšana, M.sternocleidomastoideus, miotonometer, biomechanical parameters, monitor positioning