Comparison of four specific dynamic office chairs with a conventional office chair: impact upon muscle activation, physical activity and posture

RP Ellegast, K Kraft, L Groenesteijn, F Krause… - Applied ergonomics, 2012 - Elsevier
Prolonged and static sitting postures provoke physical inactivity at VDU workplaces and are
therefore discussed as risk factors for the musculoskeletal system. Manufacturers have …

Office task effects on comfort and body dynamics in five dynamic office chairs

L Groenesteijn, RP Ellegast, K Keller, F Krause… - Applied ergonomics, 2012 - Elsevier
In the present study, we investigated the effect of office tasks on posture and movements in
field settings, and the comfort rating for chair characteristics and correlation with type of task …

Effects of dynamic office chairs on trunk kinematics, trunk extensor EMG and spinal shrinkage

JHL Van Dieën, MP De Looze, V Hermans - Ergonomics, 2001 - Taylor & Francis
Seated work has been shown to constitute a risk factor for low-back pain. This is attributed to
the prolonged and monotonous low-level mechanical load imposed by a seated posture. To …

Comparison of office chairs with fixed forwards or backwards inclining, or tiltable seats

T Bendix, JØ Winkel, F Jessen - European journal of applied physiology …, 1985 - Springer
Three adjustments of an office chair seat:—one inclining+ 10‡(forwards), one inclining−
5‡(backwards), and one being freely tiltable from− 8‡ to+ 19.5‡—were investigated using …

Lumbar posture and trunk muscle activation during a typing task when sitting on a novel dynamic ergonomic chair

K O'Sullivan, R McCarthy, A White, L O'Sullivan… - Ergonomics, 2012 - Taylor & Francis
Low back pain (LBP) is a common musculoskeletal disorder and prolonged sitting often
aggravates LBP. A novel dynamic ergonomic chair ('Back App'), which facilitates less hip …

Effects of differences in office chair controls, seat and backrest angle design in relation to tasks

L Groenesteijn, P Vink, M de Looze, F Krause - Applied ergonomics, 2009 - Elsevier
In this study the influence of chair characteristics on comfort, discomfort, adjustment time and
seat interface pressure is investigated during VDU and non-VDU tasks: The two investigated …

A biomechanical and physiological study of office seat and tablet device interaction

E Weston, P Le, WS Marras - Applied Ergonomics, 2017 - Elsevier
Twenty subjects performed typing tasks on a desktop computer and touch-screen tablet in
two chairs for an hour each, and the effects of chair, device, and their interactions on each …

The effectiveness of a chair intervention in the workplace to reduce musculoskeletal symptoms. A systematic review

SM Van Niekerk, QA Louw, S Hillier - BMC musculoskeletal disorders, 2012 - Springer
Background Prolonged sitting has been associated with musculoskeletal dysfunction. For
desk workers, workstation modifications frequently address the work surface and chair …

Length of the spine while sitting on a new concept for an office chair

DL van Deursen, RHM Goossens, JJM Evers… - Applied Ergonomics, 2000 - Elsevier
Changes in spinal length were used to evaluate a new concept for an office chair. This so-
called dynamic chair imparts passive forced motion to the seated subject. The passive …

An assessment of seated activity and postures at five workplaces

M Graf, U Guggenbühl, H Krueger - International Journal of Industrial …, 1995 - Elsevier
Static working positions and poor postures are both associated with the development of
musculo-skeletal disorders and discomfort. An assessment of people's postural behaviour …