Influences of different dynamic office chairs on muscular activation, physical activity and posture

Ellegast, Rolf; Keller, Kathrin; Berger, Helmut; Groenesteijn, Liesbeth; Vink, P.

doi:10.1201/ebk1439834992-50

Cited by 1 publication

(1 citation statement)

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“…Though more participants would have been preferable and may have led to more significant differences, this study was in line with other studies with regard to both the duration of tasks and the number of participants (e.g. Ellegast et al 2010;Elmer and Martin 2014;O'Sullivan et al 2013). A positive consideration in this study was that a variation in age, height and weight could be depicted and as a result represents a wide range of the population.…”

Section: Resultssupporting

confidence: 86%

Comparison of the postural and physiological effects of two dynamic workstations to conventional sitting and standing workstations

et al. 2015

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Increasing evidence is being found for the association of health risk factors with work-related physical inactivity. An increasing number of people are being exposed to this form of inactivity, and as a result, various interventions aimed at increasing physical activity during working hours are being developed. This study aims to investigate the differences in postural, muscular and physical activities resulting from two dynamic workstations, namely an elliptical trainer and a treadmill workstation, compared with a conventional sitting and standing workstation. Twelve participants completed five standardised office tasks in a laboratory setting at all workstations. No significant effect was found regarding changes in posture and the muscular activity was only significantly higher for the trapezius muscle (50th percentile: 8.1 %MVC) at the dynamic workstations. For the dynamic workstations, physical activity ranged from 4.0 to 14.9 × 10(-2) g, heart rate from 14.3 to 27.5 %HRR and energy expenditure from 1.8 to 3.1 METs. Practitioner Summary: Work-related physical inactivity is associated with health risk factors. In this study, physiological and postural effects of dynamic workstations were assessed in comparison to conventional workstations. No significant effects were found regarding changes in posture and muscular activity. Physical activity, heart rate and energy expenditure increased for the dynamic workstations.

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Section: Resultssupporting

confidence: 86%