Body segments decoupling in sitting: control of body posture from automatic chair adjustments

Research output: Contribution to journalArticleAcademicpeer-review

11 Citations (Scopus)

Abstract

Background Individuals who cannot functionally reposition themselves adopt a passive body posture and suffer from physical discomfort in long-term sitting. To regulate body load and to prevent sitting related mobility problems, proper posture control is important. The inability to reposition underlines the importance for seating interventions that control body posture from automatic chair adjustments. We developed an adjustable simulator chair that allows the alignment of the trunk, pelvis and thighs to be controlled independently. This study describes the system for decoupled body segments adjustment and develops a predictive model that computes angular chair configuration for desired body postures. Methods Eighteen healthy male subjects participated in this study. The experiment involved a protocol of five trials, each investigating the effect of individual chair segment angle adjustment on body segments rotation. Quasi-static chair adjustments were performed, in which angular chair configuration and body segments orientation were measured using an infrared motion capturing system and an inertia sensor attached on the pelvis. Results Linear best-fit equations together with the coefficients of determination were computed. Significant relations have been found between angular chair configuration and body segments orientation leading to an algorithm that predicts chair configuration for desired body posture. Conclusions The predictive algorithm seems applicable to compute angular chair configuration for desired body posture when the initial body–chair configuration is known. For clinical application, future experiments must be performed on impaired individuals to validate the algorithm in terms of accuracy. Keywords: Wheelchair intervention; Sitting posture; Posture control; Pelvis; Body segments
Original languageUndefined
Pages (from-to)3419-3425
Number of pages7
JournalJournal of biomechanics
Volume41
Issue number2008/16200/16
DOIs
Publication statusPublished - 8 Nov 2008

Keywords

  • BSS-Biomechatronics and rehabilitation technology
  • Body segments
  • Wheelchair intervention
  • Sitting posture
  • IR-61442
  • Posture control
  • EWI-14772
  • METIS-255067
  • Pelvis

Cite this

@article{8ce74b225ce642548f32bbb5e790c1f0,
title = "Body segments decoupling in sitting: control of body posture from automatic chair adjustments",
abstract = "Background Individuals who cannot functionally reposition themselves adopt a passive body posture and suffer from physical discomfort in long-term sitting. To regulate body load and to prevent sitting related mobility problems, proper posture control is important. The inability to reposition underlines the importance for seating interventions that control body posture from automatic chair adjustments. We developed an adjustable simulator chair that allows the alignment of the trunk, pelvis and thighs to be controlled independently. This study describes the system for decoupled body segments adjustment and develops a predictive model that computes angular chair configuration for desired body postures. Methods Eighteen healthy male subjects participated in this study. The experiment involved a protocol of five trials, each investigating the effect of individual chair segment angle adjustment on body segments rotation. Quasi-static chair adjustments were performed, in which angular chair configuration and body segments orientation were measured using an infrared motion capturing system and an inertia sensor attached on the pelvis. Results Linear best-fit equations together with the coefficients of determination were computed. Significant relations have been found between angular chair configuration and body segments orientation leading to an algorithm that predicts chair configuration for desired body posture. Conclusions The predictive algorithm seems applicable to compute angular chair configuration for desired body posture when the initial body–chair configuration is known. For clinical application, future experiments must be performed on impaired individuals to validate the algorithm in terms of accuracy. Keywords: Wheelchair intervention; Sitting posture; Posture control; Pelvis; Body segments",
keywords = "BSS-Biomechatronics and rehabilitation technology, Body segments, Wheelchair intervention, Sitting posture, IR-61442, Posture control, EWI-14772, METIS-255067, Pelvis",
author = "{van Geffen}, P. and B.I. Molier and Jasper Reenalda and Veltink, {Petrus H.} and Koopman, {Hubertus F.J.M.}",
note = "10.1016/j.jbiomech.2008.09.017",
year = "2008",
month = "11",
day = "8",
doi = "10.1016/j.jbiomech.2008.09.017",
language = "Undefined",
volume = "41",
pages = "3419--3425",
journal = "Journal of biomechanics",
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Body segments decoupling in sitting: control of body posture from automatic chair adjustments. / van Geffen, P.; Molier, B.I.; Reenalda, Jasper; Veltink, Petrus H.; Koopman, Hubertus F.J.M.

In: Journal of biomechanics, Vol. 41, No. 2008/16200/16, 08.11.2008, p. 3419-3425.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Body segments decoupling in sitting: control of body posture from automatic chair adjustments

AU - van Geffen, P.

AU - Molier, B.I.

AU - Reenalda, Jasper

AU - Veltink, Petrus H.

AU - Koopman, Hubertus F.J.M.

N1 - 10.1016/j.jbiomech.2008.09.017

PY - 2008/11/8

Y1 - 2008/11/8

N2 - Background Individuals who cannot functionally reposition themselves adopt a passive body posture and suffer from physical discomfort in long-term sitting. To regulate body load and to prevent sitting related mobility problems, proper posture control is important. The inability to reposition underlines the importance for seating interventions that control body posture from automatic chair adjustments. We developed an adjustable simulator chair that allows the alignment of the trunk, pelvis and thighs to be controlled independently. This study describes the system for decoupled body segments adjustment and develops a predictive model that computes angular chair configuration for desired body postures. Methods Eighteen healthy male subjects participated in this study. The experiment involved a protocol of five trials, each investigating the effect of individual chair segment angle adjustment on body segments rotation. Quasi-static chair adjustments were performed, in which angular chair configuration and body segments orientation were measured using an infrared motion capturing system and an inertia sensor attached on the pelvis. Results Linear best-fit equations together with the coefficients of determination were computed. Significant relations have been found between angular chair configuration and body segments orientation leading to an algorithm that predicts chair configuration for desired body posture. Conclusions The predictive algorithm seems applicable to compute angular chair configuration for desired body posture when the initial body–chair configuration is known. For clinical application, future experiments must be performed on impaired individuals to validate the algorithm in terms of accuracy. Keywords: Wheelchair intervention; Sitting posture; Posture control; Pelvis; Body segments

AB - Background Individuals who cannot functionally reposition themselves adopt a passive body posture and suffer from physical discomfort in long-term sitting. To regulate body load and to prevent sitting related mobility problems, proper posture control is important. The inability to reposition underlines the importance for seating interventions that control body posture from automatic chair adjustments. We developed an adjustable simulator chair that allows the alignment of the trunk, pelvis and thighs to be controlled independently. This study describes the system for decoupled body segments adjustment and develops a predictive model that computes angular chair configuration for desired body postures. Methods Eighteen healthy male subjects participated in this study. The experiment involved a protocol of five trials, each investigating the effect of individual chair segment angle adjustment on body segments rotation. Quasi-static chair adjustments were performed, in which angular chair configuration and body segments orientation were measured using an infrared motion capturing system and an inertia sensor attached on the pelvis. Results Linear best-fit equations together with the coefficients of determination were computed. Significant relations have been found between angular chair configuration and body segments orientation leading to an algorithm that predicts chair configuration for desired body posture. Conclusions The predictive algorithm seems applicable to compute angular chair configuration for desired body posture when the initial body–chair configuration is known. For clinical application, future experiments must be performed on impaired individuals to validate the algorithm in terms of accuracy. Keywords: Wheelchair intervention; Sitting posture; Posture control; Pelvis; Body segments

KW - BSS-Biomechatronics and rehabilitation technology

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KW - Sitting posture

KW - IR-61442

KW - Posture control

KW - EWI-14772

KW - METIS-255067

KW - Pelvis

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DO - 10.1016/j.jbiomech.2008.09.017

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EP - 3425

JO - Journal of biomechanics

JF - Journal of biomechanics

SN - 0021-9290

IS - 2008/16200/16

ER -