The effect of a dynamic chair on seated energy expenditure

Synnott, A.; Dankaerts, Wim; Seghers, Jan; Purtill, Helen; O’Sullivan, Kieran

doi:10.1080/00140139.2017.1324114

Cited by 11 publications

(6 citation statements)

References 38 publications

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“…It is likely that the sit/stand time ratio, training, and follow-up impacts these outcomes, as reported by the authors of the previously cited review. Different interventions have tried to address sedentary behavior associated with office work, for instance, increasing energy expenditure through the use of dynamic chairs: although dynamic seating did result in higher levels of energy expenditure, this was still below the sedentary threshold of 1.5 METS (Synnott et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

Application of mismatch equations in dynamic seating designs

et al. 2021

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Anthropometry is critical for product and workplace design. Highly prevalent, office work is associated with sedentarism and physical discomfort due to prolonged sitting. Dynamic seating (alternating across sitting, perching, and standing) has been suggested as an alternative to overcome those problems. The current study tested a large sample of anthropometric data for mismatch levels against national and international office furniture standards using dynamic seating as a framework with traditional and perching mismatch equations, applied to three recommended dynamic seating components. Dimensions present in the standards used did not match the majority of the sample. For sitting, seat width and depth individually presented the lowest levels of match, as well as under cumulative fit of all office furniture dimensions. However, these were alleviated when incorporating adjustability. Perching was shown to be generally impeded given commercially-available chair height options. Limitations in state-of-the-art perching equations are discussed, and two new models are proposed as design alternatives. Further research should focus on testing the criteria presented in this research through discomfort and objective measures.

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Section: Discussionmentioning

confidence: 99%

Application of mismatch equations in dynamic seating designs

et al. 2021

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“…In particular, addressing sitting spinal posture may help reduce symptoms of patients with back pain [8,9]. Dynamic chairs have been proposed to address the negative effects of prolonged sitting by increasing the effort required to maintain sitting balance, stimulating posture variation, promoting lordotic lumbar postures and decreasing lumbar muscle tension [10].…”

Section: Introductionmentioning

confidence: 99%

“…prolonged sitting by increasing the effort required to maintain sitting balance, stimulating posture variation, promoting lordotic lumbar postures and decreasing lumbar muscle tension [10].…”

Section: Introductionmentioning

confidence: 99%

Trunk Posture Adaptations during Sitting on Dynamic Stool: A Validation Study

2020

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Back pain is a complex condition that results from multiple factors including sitting issues such as the chair type and spinal sitting posture. The physiological spinal curvature on the sagittal plane represents a typical feature of good body posture. Sitting postures matching the physiological shape of the spine on the sagittal plane during standing are deemed advantageous from a postural point of view. The aim of this study was to validate a novel dynamic stool by comparing trunk posture adaptations on the sagittal plane during dynamic sitting vs. conventional sitting (standard stool) in healthy people. In total, 100 healthy adults were included. Age, sex and body mass index were recorded. Thoracic kyphosis and lumbar lordosis were measured with the IncliMed® goniometer during standing posture, conventional sitting posture (standard stool) and dynamic sitting posture (novel dynamic stool). Sitting posture was maintained for 2 min before evaluation. Thoracic kyphosis and lumbar lordosis were significantly different between standing vs. sitting (dynamic and conventional) posture (p < 0.001) and between dynamic vs. conventional sitting posture (p < 0.001). Sitting on the novel dynamic stool tested in this study was shown to provide a greater match of thoracic kyphosis and lumbar lordosis with the physiological spinal curvature on the sagittal plane during standing than conventional sitting.

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“…The erect sitting is characterized by the 90 • angle that should be formed by the thighs with the trunk, the arms and forearms, the thighs and shanks and the lower leg with the foot. If the angles between these body parts do not form a 90 • angle, it is a so-called relaxed sitting position [32][33][34][35][36].…”

mentioning

confidence: 99%

“…thighs with the trunk, the arms and forearms, the thighs and shanks and the lower leg with the foot. If the angles between these body parts do not form a 90° angle, it is a socalled relaxed sitting position [32][33][34][35][36]. During the testing procedure in the standing position, some of the participants showed deformations of the spine.…”

mentioning

confidence: 99%

Influence of Various Types of Office Desk Chair for Dynamizing the Operation Assessed by Raster Stereography

et al. 2021

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The current development trend of the operational activities indicates an increase in occupations which last for a few generations and whose primary position is the activity in the sitting position. This trend is directly connected with the technological progress and development of the society within Industry 4.0. However, the workplaces intended for sitting occupations that are designed according to the current standards are unsuitable from several perspectives. The long-term sitting activities at most actual workplaces cause an accumulation of the static load. For this reason, the article deals with dynamizing the activities in the sitting position. The presented research is based on utilizing the knowledge of the sitting posture dynamics and on the information acquired through diagnostics based on the Raster Stereography as an innovative method based on modelling a natural human spin. The article brings the first research results, which points out the fact that probably not all types of dynamic sitting that are nowadays preferred are suitable for long-term working.

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The effect of a dynamic chair on seated energy expenditure

Cited by 11 publications

References 38 publications

Application of mismatch equations in dynamic seating designs

Application of mismatch equations in dynamic seating designs

Trunk Posture Adaptations during Sitting on Dynamic Stool: A Validation Study

Influence of Various Types of Office Desk Chair for Dynamizing the Operation Assessed by Raster Stereography

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