Assessing Muscle Tensions During VDT Works with Surface Electromyography

Yim, Seon Hee; Park, Hee-Sok; Kim, Hyun‐Wook

doi:10.35371/kjoem.2000.12.4.524

Cited by 6 publications

(4 citation statements)

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“…Furthermore, the correlation between the four muscles and the different computer desk levels was analyzed. The significant differences were found in interactions of the two muscles of upper trapezius and wrist extensor of the subjects in both groups with the varied level of the computer desk, which might be attributable to the effects of the level of computer desk over the upper trapezius of which major function was originally supposed to raise the scapula [48]. In addition, the wrist extensor of the patients in the C6 group was found to be affected more by the varied levels of the computer desk than those in the T2-T6 group, which might be due to their difficulty in controlling their forearm because of the complete loss of finger functions, partial loss of wrist joint functions, and weak pronator and supinator [49, 50].…”

Section: Discussionmentioning

confidence: 99%

Effects of the Computer Desk Level on the Musculoskeletal Discomfort of Neck and Upper Extremities and EMG Activities in Patients with Spinal Cord Injuries

Kang¹,

Her

Lee

et al. 2019

Occupational Therapy International

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Background. Computers are used as a means of social communication, for work and other purposes. However, patients with spinal cord injuries may have a higher risk than normal individuals with musculoskeletal problems when using computers owing to their inability to control respective postures due to problems in motor and sensory functioning.Objectives. This study is aimed at identifying the effect of computer desk heights on musculoskeletal discomforts of the neck and upper extremities and EMG activities in patients with spinal cord (C6) and upper thoracic spinal cord injuries.Methods. Participants of the present study were the patients diagnosed with ASIA A or B. The patients were divided into two groups according to their spinal cord injuries: C6 group and T2-T6 group. The level of the desk was set at 5 cm below the elbow, at the elbow level, and 5 cm above the elbow level. Electromyography was used to measure the duration of typing task EMG(%RVC) of the cervical erector spinae, upper trapezius, anterior deltoid, and wrist extensor. Subjective musculoskeletal discomfort (Borg-RPE) was measured at the end of the experiment.Results. The two groups showed differences in terms of RPE corresponding to each level of the computer desk (p<.05). Postanalysis revealed the C6 group had decreased RPE as the level of computer desk increased, whereas the subjects in the T2-T6 group had decreased RPE values in accordance with the decreasing level of computer desk (p<.05). In EMG, both groups had no significant differences (p>.05). However, in terms of the interaction between the muscles and the level of computer desk in both groups, the differences in the interactions of the upper trapezius and wrist extensor with each level of the desk were found (p<.05).Conclusion. This study is meaningful in that it confirms computer work posture and preference of spinal cord-injured individuals.

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Section: Discussionmentioning

confidence: 99%

Effects of the Computer Desk Level on the Musculoskeletal Discomfort of Neck and Upper Extremities and EMG Activities in Patients with Spinal Cord Injuries

Kang¹,

Her

Lee

et al. 2019

Occupational Therapy International

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“…The dose-response relationship has been used to evaluate the risk factors during work 1 ) . Research on dose-response has been performed for diverse works, such as sewing 6 ) , milking 7 ) , looking through a microscope 3 ) , and working on a computer 4 , 5 ) . It has helped to prevent musculoskeletal system diseases by analyzing the environmental factors that may trigger such diseases.…”

Section: Dicussionmentioning

confidence: 99%

“…Yim et al 4 ) asserted that muscle activity of the upper trapezius muscle, supraspinatus muscle, infraspinatus muscle, and rhomboid muscles increased, and research has suggested that computer table height is an etiology of neck and shoulder pain in computer users 5 , 21 ) .…”

Section: Dicussionmentioning

confidence: 99%

“…Research on musculoskeletal pain has presented empirical grounds for improving working environments through the dose-response relationship 1 ) , and has prevented musculoskeletal problems by identifying factors that trigger such problems across a range of work-related activities 2 , 3 , 4 , 5 , 6 , 7 ) . However, physical therapists’ musculoskeletal system problems in physical therapists have been the subjects of limited to investigation and research 8 , 9 ) , and information is needed on the factors that cause such problems and on techniques for resolving them based on a dose-response relationship.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Treatment Table Height on Shoulder Muscles during Ultrasound Therapy Work

Kim

Kang

et al. 2014

J Phys Ther Sci

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[Purpose] The purpose of this study was to propose a table height that can reduce shoulder muscle fatigue by analyzing and comparing median frequencies of shoulder muscles at different table heights when performing therapeutic ultrasounds work. [Subjects and Methods] The subjects were 63 healthy male adults who were equally and randomly assigned to a standard height group (SHG), a high height group (HHG), and a low height group (LHG). The standard table height was set at the level of the elbow joint when the subjects flexed their elbow while in a sitting position. High height and low height were set 10 cm higher and 10 cm lower, respectively, than the standard height. Muscle fatigue of the upper trapezius, middle deltoid, rhomboid, and infraspinatus of the subjects was measured during ultrasound treatment work at each table height. [Results] Median frequencies of the upper trapezius, middle deltoid, rhomboid, and infraspinatus muscles were significantly lower in the HHG than in to the LHG. [Conclusion] When therapeutic ultrasound is performed using a table that has a height lower than that of the elbow joint, the median frequency of the shoulder muscle increases, hence decreasing muscle fatigue. This way, musculoskeletal pain as a result of performing therapeutic ultrasound can be prevented.

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The Effects of Sitting Posture on Cervical Flexion Angle and Pain during Smart Phone Use in Young Adults

Chun¹,

Kim²,

Choi³

2017

jkpts

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Assessing Muscle Tensions During VDT Works with Surface Electromyography

Cited by 6 publications

References 0 publications

Effects of the Computer Desk Level on the Musculoskeletal Discomfort of Neck and Upper Extremities and EMG Activities in Patients with Spinal Cord Injuries

Effects of the Computer Desk Level on the Musculoskeletal Discomfort of Neck and Upper Extremities and EMG Activities in Patients with Spinal Cord Injuries

Effect of Treatment Table Height on Shoulder Muscles during Ultrasound Therapy Work

The Effects of Sitting Posture on Cervical Flexion Angle and Pain during Smart Phone Use in Young Adults

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