Sitting comfort and discomfort and the relationships with objective measures

Looze, M.P. de; Kuijt‐Evers, L.F.M.; Dieën, Jaap H. van

doi:10.1080/0014013031000121977

Cited by 509 publications

(308 citation statements)

References 29 publications

(44 reference statements)

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“…Feelings of discomfort among wheelchair users can have serious consequences, including equipment abandonment, decreased satisfaction, and an inability to function throughout the day [12]. Previous studies have shown that high peak pressures at the body-seat interface correlated with seating discomfort [13][14]. Qualitative research has also been undertaken with respect to seating and comfort.…”

Section: Introductionmentioning

confidence: 99%

Usage of tilt-in-space, recline, and elevation seating functions in natural environment of wheelchair users

Ding

Leister²,

Cooper³

et al. 2008

JRRD

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Abstract-This study examined the usage of powered seating functions, including tilt-in-space, backrest recline, and seat elevation, among a group of wheelchair users during their typical daily activities. Twelve individuals who used a power wheelchair with seating functions participated in the study. They drove their own wheelchair and used the seating functions as needed in their community environment for about 2 weeks while the seating function usage was recorded with a portable device. We found that subjects occupied their wheelchair for 11.8 +/-3.4 hours a day (all data shown as mean +/-standard deviation). While occupying their wheelchairs, they accessed tilt-in-space, backrest recline, and seat elevation 19 +/-14 times a day for 64.1% +/-36.8%, 12 +/-8 times for 76.0% +/-29.8%, and 4 +/-4 times for 22.5% +/-34.9%, respectively. Subjects chose to stay in tilted and reclined positions in their wheelchair for 39.3% +/-36.5% of their time each day. They spent little time in a fully upright position. Subjects changed their seating positions every 53.6 +/-47.0 minutes. Time spent in positions of different seating pressures varied among subjects. The information collected could enhance clinical practice of wheelchair provision, resulting in better compliance with clinical instructions and appropriate use of seating functions among wheelchair users.

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Section: Introductionmentioning

confidence: 99%

Usage of tilt-in-space, recline, and elevation seating functions in natural environment of wheelchair users

Ding

Leister²,

Cooper³

et al. 2008

JRRD

View full text Add to dashboard Cite

show abstract

“…This may be in the form of discomfort eliciting movement or subconscious postural shifts or fidgeting. Many studies over the years have monitored movements in chairs a s metrics of co mfort and function [25][26][27][28], thereby establishing a base of knowledge about sitting as a dynamic activity. Many people at risk of dev eloping PUs are either unable to effectively reposition themselves or are not provided with the sensory feedback that elicits movements.…”

Section: Interventions For Reducing Duration Of Loadingmentioning

confidence: 99%

Assessing evidence supporting redistribution of pressure for pressure ulcer prevention: A review

Sprigle¹,

Sonenblum²

2011

JRRD

102

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Abstract-The formation and underlying causes of p ressure ulcers (PUs) are quite complex, with multiple influencing factors. However, by definition pressure ulcers cannot form without loading, or pressure, on tissue. Clinical interventions typically target the magnitude and/or duration of loading. Pressure magnitude is managed by the selection of support surfaces and postural supports as well as body posture on supporting surfaces. Duration is addressed via turning and weight shifting frequency as well as with th e use of dynamic s urfaces that actively redistribute pressure on the body surfaces. This article shows that preventative interventions must be targeted to both magnitude and duration and addresses the rationale behind several common clinical interventions-some with more scientific evidence than others.

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“…The effect of vibration is quantified by perceived discomfort. Recent studies [2][3] have shown an intricate and complex relation between feelings of discomfort and comfort. In this study, discomfort is used throughout in relation to the perception of vibration.…”

Section: Introductionmentioning

confidence: 99%

Quantification of Human Discomfort in a Vehicle Using a Four-Post Rig Excitation

Ibicek

Thite

2012

Journal of Low Frequency Noise, Vibration and Active Control

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The ride comfort of a vehicle is a vital aspect determining competitiveness of vehicles. The comfort is intricately related to feelings of discomfort due to vibration. The discomfort depends on various dynamic aspects of the suspension-seat and surrounding system. In industry, the discomfort due to vibration is assessed by road testing on various surfaces; these road tests may not be accurately repeatable. Discomfort, in general, can be assessed by measurements based on a shaker table and seat combination. These results when used for "in vehicle situations" may not accurately indicate the level of human discomfort in a vehicle. In view of this, to quantify seated human discomfort in a vehicle, measurements were performed using a four-post rig simulator; the setup allows controlled in-situ experiments to be conducted. A group of six subjects were exposed to sinusoidal vibration at five magnitudes in the vertical direction for heave, roll and pitch motion. The objective is to develop a discomfort metric which could be used to compare vehicles. The preliminary results show varying significance of roll, pitch and heave motion. The results, however, confirm the nonlinear variation of perception as a function of the physical stimulus. The test setup can be used to study the effects of complex road inputs and eventually may contribute towards reduced reliance on road tests.

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Sitting comfort and discomfort and the relationships with objective measures

Cited by 509 publications

References 29 publications

Usage of tilt-in-space, recline, and elevation seating functions in natural environment of wheelchair users

Usage of tilt-in-space, recline, and elevation seating functions in natural environment of wheelchair users

Assessing evidence supporting redistribution of pressure for pressure ulcer prevention: A review

Quantification of Human Discomfort in a Vehicle Using a Four-Post Rig Excitation

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