Effects of a ball-backrest chair on the muscles associated with upper crossed syndrome when working at a VDT

Won Gyu Yoo, Chung Hwi Yi, Min Hee Kim

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

This study examined the effect of a ball-backrest chair on the weakness and tightness of muscles associated with upper crossed syndrome when working at a visual display terminal (VDT). The surface electromyography (EMG) was recorded from the serratus anterior, middle trapezius, and upper trapezius muscles of 20 adults as they performed VDT work, which are known as the weakened and tightened muscles of upper crossed syndrome. The recorded signals were averaged and normalized to the mean amplitude of the EMG signal obtained during submaximal reference voluntary contractions. The significance of differences between the use of a general-purpose backrest and a ball backrest was tested by paired t-test, with the significance cutoff set at α=0.05. The activities of the serratus anterior and middle trapezius muscles increased and that of the upper trapezius muscle decreased when sitting in a ball-backrest chair compared to when sitting in a chair with a general-purpose backrest (p<0.05). These results indicate that the use of a ball-backrest chair reduces the risk of patients with upper crossed syndrome developing muscles soreness or injury related to overuse when working at a VDT.

Original languageEnglish
Pages (from-to)239-244
Number of pages6
JournalWork
Volume29
Issue number3
Publication statusPublished - 2007 Dec 1

Fingerprint

Superficial Back Muscles
Muscles
Electromyography
Muscle Tonus
Myalgia
Muscle Weakness
Wounds and Injuries

All Science Journal Classification (ASJC) codes

  • Rehabilitation
  • Public Health, Environmental and Occupational Health

Cite this

@article{1dad66ff7cfa4b69895f24d778a15fcb,
title = "Effects of a ball-backrest chair on the muscles associated with upper crossed syndrome when working at a VDT",
abstract = "This study examined the effect of a ball-backrest chair on the weakness and tightness of muscles associated with upper crossed syndrome when working at a visual display terminal (VDT). The surface electromyography (EMG) was recorded from the serratus anterior, middle trapezius, and upper trapezius muscles of 20 adults as they performed VDT work, which are known as the weakened and tightened muscles of upper crossed syndrome. The recorded signals were averaged and normalized to the mean amplitude of the EMG signal obtained during submaximal reference voluntary contractions. The significance of differences between the use of a general-purpose backrest and a ball backrest was tested by paired t-test, with the significance cutoff set at α=0.05. The activities of the serratus anterior and middle trapezius muscles increased and that of the upper trapezius muscle decreased when sitting in a ball-backrest chair compared to when sitting in a chair with a general-purpose backrest (p<0.05). These results indicate that the use of a ball-backrest chair reduces the risk of patients with upper crossed syndrome developing muscles soreness or injury related to overuse when working at a VDT.",
author = "Yoo, {Won Gyu} and Yi, {Chung Hwi} and Kim, {Min Hee}",
year = "2007",
month = "12",
day = "1",
language = "English",
volume = "29",
pages = "239--244",
journal = "Work",
issn = "1051-9815",
publisher = "IOS Press",
number = "3",

}

Effects of a ball-backrest chair on the muscles associated with upper crossed syndrome when working at a VDT. / Yoo, Won Gyu; Yi, Chung Hwi; Kim, Min Hee.

In: Work, Vol. 29, No. 3, 01.12.2007, p. 239-244.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effects of a ball-backrest chair on the muscles associated with upper crossed syndrome when working at a VDT

AU - Yoo, Won Gyu

AU - Yi, Chung Hwi

AU - Kim, Min Hee

PY - 2007/12/1

Y1 - 2007/12/1

N2 - This study examined the effect of a ball-backrest chair on the weakness and tightness of muscles associated with upper crossed syndrome when working at a visual display terminal (VDT). The surface electromyography (EMG) was recorded from the serratus anterior, middle trapezius, and upper trapezius muscles of 20 adults as they performed VDT work, which are known as the weakened and tightened muscles of upper crossed syndrome. The recorded signals were averaged and normalized to the mean amplitude of the EMG signal obtained during submaximal reference voluntary contractions. The significance of differences between the use of a general-purpose backrest and a ball backrest was tested by paired t-test, with the significance cutoff set at α=0.05. The activities of the serratus anterior and middle trapezius muscles increased and that of the upper trapezius muscle decreased when sitting in a ball-backrest chair compared to when sitting in a chair with a general-purpose backrest (p<0.05). These results indicate that the use of a ball-backrest chair reduces the risk of patients with upper crossed syndrome developing muscles soreness or injury related to overuse when working at a VDT.

AB - This study examined the effect of a ball-backrest chair on the weakness and tightness of muscles associated with upper crossed syndrome when working at a visual display terminal (VDT). The surface electromyography (EMG) was recorded from the serratus anterior, middle trapezius, and upper trapezius muscles of 20 adults as they performed VDT work, which are known as the weakened and tightened muscles of upper crossed syndrome. The recorded signals were averaged and normalized to the mean amplitude of the EMG signal obtained during submaximal reference voluntary contractions. The significance of differences between the use of a general-purpose backrest and a ball backrest was tested by paired t-test, with the significance cutoff set at α=0.05. The activities of the serratus anterior and middle trapezius muscles increased and that of the upper trapezius muscle decreased when sitting in a ball-backrest chair compared to when sitting in a chair with a general-purpose backrest (p<0.05). These results indicate that the use of a ball-backrest chair reduces the risk of patients with upper crossed syndrome developing muscles soreness or injury related to overuse when working at a VDT.

UR - http://www.scopus.com/inward/record.url?scp=38449114868&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=38449114868&partnerID=8YFLogxK

M3 - Article

C2 - 17942995

AN - SCOPUS:38449114868

VL - 29

SP - 239

EP - 244

JO - Work

JF - Work

SN - 1051-9815

IS - 3

ER -