TY - JOUR
T1 - Effect of different sitting postures on lung capacity, expiratory flow, and lumbar lordosis
AU - Lin, Fang
AU - Parthasarathy, Sriranjani
AU - Taylor, Susan J.
AU - Pucci, Deborah
AU - Hendrix, Ronald W.
AU - Makhsous, Mohsen
N1 - Funding Information:
Supported by the Paralyzed Veterans Association (grant no. 2321-01), the National Institutes of Health (grant no. R24 Rehab Network), and the Falk Medical Trust.
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2006/4
Y1 - 2006/4
N2 - Objective: To investigate the effect of sitting posture on lung capacity and expiratory flow (LC-EF) and lumbar lordosis. Design: Repeated measures on 1 group of subjects in 4 postures. Setting: Laboratory. Participants: Seventy able-bodied volunteers. Interventions: Postures were assumed randomly: normal, with full ischial support and flat lumbar support; slumped, with the pelvis positioned in the middle of seat while leaning against the backrest; against the back part of the seat without ischial support (WO-BPS), with partially removed ischial support and an enhanced lumbar support; and standing. Main Outcome Measures: For LC-EF, forced vital capacity, maximum forced expiratory flow, forced expiratory volume in 1 second, and peak expiratory flow; and lumbar lordosis. Results: All LC-EF measures in standing were significantly superior to those in slumped and normal sitting, and 4 measures were significantly higher than in WO-BPS. In slumped sitting, LC-EF significantly decreased from that in normal sitting. WO-BPS sitting significantly increased 4 of the LC-EF measures from those in the normal sitting. Lumbar lordosis was the highest in standing and progressively decreased in WO-BPS, normal, and slumped sitting. Conclusions: Slumped sitting significantly decreased LC-EF and lumbar lordosis. Because it increases the lumbar lordosis and promotes LC-EF, the WO-BPS posture may be a better seating option for people sitting for a prolonged time.
AB - Objective: To investigate the effect of sitting posture on lung capacity and expiratory flow (LC-EF) and lumbar lordosis. Design: Repeated measures on 1 group of subjects in 4 postures. Setting: Laboratory. Participants: Seventy able-bodied volunteers. Interventions: Postures were assumed randomly: normal, with full ischial support and flat lumbar support; slumped, with the pelvis positioned in the middle of seat while leaning against the backrest; against the back part of the seat without ischial support (WO-BPS), with partially removed ischial support and an enhanced lumbar support; and standing. Main Outcome Measures: For LC-EF, forced vital capacity, maximum forced expiratory flow, forced expiratory volume in 1 second, and peak expiratory flow; and lumbar lordosis. Results: All LC-EF measures in standing were significantly superior to those in slumped and normal sitting, and 4 measures were significantly higher than in WO-BPS. In slumped sitting, LC-EF significantly decreased from that in normal sitting. WO-BPS sitting significantly increased 4 of the LC-EF measures from those in the normal sitting. Lumbar lordosis was the highest in standing and progressively decreased in WO-BPS, normal, and slumped sitting. Conclusions: Slumped sitting significantly decreased LC-EF and lumbar lordosis. Because it increases the lumbar lordosis and promotes LC-EF, the WO-BPS posture may be a better seating option for people sitting for a prolonged time.
KW - Lordosis
KW - Lung volume measurements
KW - Posture
KW - Rehabilitation
UR - http://www.scopus.com/inward/record.url?scp=33645340048&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33645340048&partnerID=8YFLogxK
U2 - 10.1016/j.apmr.2005.11.031
DO - 10.1016/j.apmr.2005.11.031
M3 - Article
C2 - 16571389
AN - SCOPUS:33645340048
SN - 0003-9993
VL - 87
SP - 504
EP - 509
JO - Archives of Physical Medicine and Rehabilitation
JF - Archives of Physical Medicine and Rehabilitation
IS - 4
ER -