Static and dynamic postural loadings during computer work in females: Sitting on an office chair versus sitting on an exercise ball

Kingma, Idsart; Dieën, Jaap H. van

doi:10.1016/j.apergo.2008.04.004

Cited by 104 publications

(106 citation statements)

References 24 publications

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“…In one study (Gregory et al, 2006), the chair with a backrest involved significantly lower activation of TES, and significantly lower LBD and OBD. In the other study comparing to sitting on an exercise ball (Kingma & van Dieen, 2009), using a backrest was associated with lower LES mean activation, lower variation in activation of LES, and lower LES muscle fatigue. This study did not assess discomfort, although they reported that participants experienced less LBD and upper back discomfort when using the backrest during pilot testing.…”

Section: Study 2: Effect Of Providing a Backrestmentioning

confidence: 99%

“…Five of the seven studies in the backrest review reported that using a backrest significantly reduced LES muscle activation (Cram & Vinitzky, 1995;Hardage et al, 1983;Kingma & van Dieen, 2009;Lander et al, 1987;Yoo et al, 2008). A backrest had minimal effects on the other trunk muscles studied.…”

Section: Muscle Activationmentioning

confidence: 99%

“…The only two studies (Gregory et al, 2006;Lander et al, 1987) which specifically examined the effect of a backrest on sitting discomfort favored using a backrest. One other study (Kingma & van Dieen, 2009) did not specifically measure discomfort, but also reported increased participant comfort using a backrest during pilot testing. None of these three studies included people with LBP.…”

Section: Sitting Discomfortmentioning

confidence: 99%

See 2 more Smart Citations

Does Using a Chair Backrest or Reducing Seated Hip Flexion Influence Trunk Muscle Activity and Discomfort? A Systematic Review

Curran¹,

O’Sullivan

et al. 2015

Hum Factors

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Objective: This paper systematically reviews the effect of chair backrests and reducing seated hip flexion on low back discomfort (LBD) and trunk muscle activation.Background: Prolonged sitting commonly exacerbates low back pain (LBP). Several modifications to seated posture and chair design have been recommended, including using chairs with backrests and chairs that reduce hip flexion.Method: Electronic databases were searched by two independent assessors. Part 1 of this review includes 26 studies comparing the effect of sitting with at least two different hip angles. In Part 2, seven studies that compared the effect of sitting with and without a backrest were eligible. Study quality was assessed using the PEDro scale.Results: Significant confounding variables and a relatively small number of randomized controlled trials (RCTs) involving people with LBP complicates analysis of the results. There was moderate evidence that chair backrests reduce paraspinal muscle activation, and limited evidence that chair backrests reduce LBD. There was no evidence that chairs involving less hip flexion reduce LBP or LBD, or consistently alter trunk muscle activation. However, participants in several studies subjectively preferred the modified chairs involving less hip flexion. Conclusion:The limited evidence to support the use of chairs involving less seated hip flexion, or the effect of a backrest, is consistent with the limited evidence that other isolated chair design features can reduce LBP.Application: LBP management is likely to require consideration of several factors in addition to sitting position. Larger RCTs involving people with LBP are required.

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Section: Study 2: Effect Of Providing a Backrestmentioning

confidence: 99%

Section: Muscle Activationmentioning

confidence: 99%

Section: Sitting Discomfortmentioning

confidence: 99%

See 1 more Smart Citation

Does Using a Chair Backrest or Reducing Seated Hip Flexion Influence Trunk Muscle Activity and Discomfort? A Systematic Review

Curran¹,

O’Sullivan

et al. 2015

Hum Factors

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“…The concept of a dynamic chair can be variously defined as backrest and seat pan sloping (Dieen et al, 2001), rotation of seat pan (Deursen et al, 2000), forward sloping of seat pan (Roh et al, 2012), changing the depth of lumbar support (Tyson et al, 2003), and dynamic seat pan (Kingma and Dieen, 2009) such as the ball chair. As a common opinion in the literature, it can be defined as a chair that can support the occupants physically and technologically to reflect their behaviors.…”

Section: Office Chair Backrest_ Lumbar Supportmentioning

confidence: 99%

A Trend Analysis of Dynamic Chair and Applied Technology

Hyeong¹,

Roh²,

Park³

et al. 2014

Journal of the Ergonomics Society of Korea

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Objective: The objective of this study was to define the Dynamic Sitting (DS) through trend analysis and research on the Dynamic Chair (DC) and applied technologies. Background:The effects of changing posture on the human body have been studied to find out healthy sitting postures. It is believed that changing posture is effective in reducing disc pressure on spinal cord and preventing back pain and musculoskeletal disease. But, the definition of DS and trends of DC have not been researched yet. Therefore, trend analysis of DC and its applied technologies are required to define dynamic sitting posture. Method:We researched the type of occupant postures from previous studies. And then, sitting behaviors were classified into three types; (1) sitting and standing, (2) working and studying, (3) taking a rest.Results: Variety shapes of DC and applied technologies were found out. From the result, the trend of DC and applied technology were summarized from three perspectives. ; (1) changing the chair functions according to user's intention, (2) conversion of dynamic chair technologies to office chair mechanism, (3) enables the user to change their sitting posture without operating control device. Conclusion:From this study, we defined dynamic sitting posture and analyzed the trend of DC and its applied technologies. This result might be used to develop an office chair for healthy sitting. But further investigation is required to figure out the technologies and functions for development of healthy chair. Application:The results of the publishing trend analysis might help to determine design concept of office chair.

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“…The computer work typically results in low-level static loading of back, shoulder and neck muscles as well as in static spine loading. Prolonged, static sitting is associated with muscular disorders, the development of disc degeneration or the increase of spine stiffness [6,15]. Dynamic sitting, thus a behavior where the person dynamically activates lumbar muscles and spine movement is increased in a physiologically reasonable range is beneficial and will help to prevent back pain.…”

Section: Introductionmentioning

confidence: 99%

Finding the Right Way for Interrupting People Improving Their Sitting Posture

Haller

Richter

Brandl

et al. 2011

Lecture Notes in Computer Science

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Abstract. In this paper, we present three different ways of interrupting people to posture guidance. We developed an ergonomically adjustable office chair equipped with four sensors measuring the office worker's posture. It is important that users do some training after bad posture and be alerted of this; therefore, we implemented three different alert modalities (Graphical Feedback, Physical Feedback, and Vibrotactile Feedback), with the goal to find out which of the techniques is the most effective interruption modality without causing a huge disruption effect. To measure the task-performance, we conducted a formal user study. Our user study results show there are different effects on performance and disruptiveness caused by the three interruption techniques. While the vibrotactile feedback might have higher information awareness benefits at the beginning, it causes a huge intrusion side-effect. Thus, the physical feedback was rated less disruptive to the workflow as the other two feedback modalities.

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Static and dynamic postural loadings during computer work in females: Sitting on an office chair versus sitting on an exercise ball

Cited by 104 publications

References 24 publications

Does Using a Chair Backrest or Reducing Seated Hip Flexion Influence Trunk Muscle Activity and Discomfort? A Systematic Review

Does Using a Chair Backrest or Reducing Seated Hip Flexion Influence Trunk Muscle Activity and Discomfort? A Systematic Review

A Trend Analysis of Dynamic Chair and Applied Technology

Finding the Right Way for Interrupting People Improving Their Sitting Posture

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