EFFECT OF SITTING POSTURE ON THORACIC CONFIGURATION AND CHANGES IN VOLUME OF HEMITHORACES

Background: Poor posture is detrimental to breathing. Our purpose was to investigate the effect of upright and hunchbacked sitting on thoracic configuration and changes in the volume of the thorax during quiet and volitional deep breathing. Methods: The participants were 11 healthy men with a mean...

Full description

Bibliographic Details
Main Authors: Shōbo A, Kakizaki F
Format: Article
Language:English
Published: IJPHY 2017-06-01
Series:International Journal of Physiotherapy
Subjects:
Online Access:https://www.ijphy.org/index.php/journal/article/view/295
id doaj-09c27d57a3cf42db9838b567c5144db9
record_format Article
spelling doaj-09c27d57a3cf42db9838b567c5144db92020-11-25T01:10:30ZengIJPHYInternational Journal of Physiotherapy2349-59872348-83362017-06-014310.15621/ijphy/2017/v4i3/149065EFFECT OF SITTING POSTURE ON THORACIC CONFIGURATION AND CHANGES IN VOLUME OF HEMITHORACESShōbo A0Kakizaki F1Faculty of Health Science Technology, Department of Physical Therapy, Saitama, Japan.Faculty of Health Science Technology Department of Physical Therapy Saitama, Japan Background: Poor posture is detrimental to breathing. Our purpose was to investigate the effect of upright and hunchbacked sitting on thoracic configuration and changes in the volume of the thorax during quiet and volitional deep breathing. Methods: The participants were 11 healthy men with a mean age of 21.6 years, mean body mass of 59.8 kg, mean height of 169.7 cm and a body mass index of 20.7 kg/m2. Eighty-four reflective markers were placed on the trunk. Three-dimensional motion analysis measured the volume within the hemithoraces. To calculate upper and lower thoracic volumes, six imaginary hexahedra were visualized using four reflective markers for each on both aspects of the thorax. Each hexahedron was divided into three imaginary triangular pyramids to calculate positional vectors. Finally, the volume for the hexahedra and triangular pyramids was calculated. Upper thoracic volume encompassed a space from the sternal notch to a midpoint on the ventral aspect of the third rib and the lower thoracic volume from the xiphoid process to the midpoint on tenth rib’s dorsal aspect. Results: In hunchbacked sitting during quiet breathing the left lower hemithorax yielded a significantly larger volume (p=0.003), and both breathing patterns during inspiration and expiration yielded a significantly greater change in thoracic configuration (p=0.01, p=0.016). Conclusion: Findings suggested that, in a hunchbacked sitting, there was decreased thoracic asymmetry with re-establishment of thoracic vertebral alignment, consequently stabilizing the sitting position, but breathing was suppressed and tidal volume decreased. Physiotherapy should aim at ensuring correction of hunchbacked posture and maintenance of thoracic symmetry. https://www.ijphy.org/index.php/journal/article/view/295thoracic volumehemithoraxthree-dimensional motion analysishunchbacked sittingquiet breathingvolitional deep breathing.
collection DOAJ
language English
format Article
sources DOAJ
author Shōbo A
Kakizaki F
spellingShingle Shōbo A
Kakizaki F
EFFECT OF SITTING POSTURE ON THORACIC CONFIGURATION AND CHANGES IN VOLUME OF HEMITHORACES
International Journal of Physiotherapy
thoracic volume
hemithorax
three-dimensional motion analysis
hunchbacked sitting
quiet breathing
volitional deep breathing.
author_facet Shōbo A
Kakizaki F
author_sort Shōbo A
title EFFECT OF SITTING POSTURE ON THORACIC CONFIGURATION AND CHANGES IN VOLUME OF HEMITHORACES
title_short EFFECT OF SITTING POSTURE ON THORACIC CONFIGURATION AND CHANGES IN VOLUME OF HEMITHORACES
title_full EFFECT OF SITTING POSTURE ON THORACIC CONFIGURATION AND CHANGES IN VOLUME OF HEMITHORACES
title_fullStr EFFECT OF SITTING POSTURE ON THORACIC CONFIGURATION AND CHANGES IN VOLUME OF HEMITHORACES
title_full_unstemmed EFFECT OF SITTING POSTURE ON THORACIC CONFIGURATION AND CHANGES IN VOLUME OF HEMITHORACES
title_sort effect of sitting posture on thoracic configuration and changes in volume of hemithoraces
publisher IJPHY
series International Journal of Physiotherapy
issn 2349-5987
2348-8336
publishDate 2017-06-01
description Background: Poor posture is detrimental to breathing. Our purpose was to investigate the effect of upright and hunchbacked sitting on thoracic configuration and changes in the volume of the thorax during quiet and volitional deep breathing. Methods: The participants were 11 healthy men with a mean age of 21.6 years, mean body mass of 59.8 kg, mean height of 169.7 cm and a body mass index of 20.7 kg/m2. Eighty-four reflective markers were placed on the trunk. Three-dimensional motion analysis measured the volume within the hemithoraces. To calculate upper and lower thoracic volumes, six imaginary hexahedra were visualized using four reflective markers for each on both aspects of the thorax. Each hexahedron was divided into three imaginary triangular pyramids to calculate positional vectors. Finally, the volume for the hexahedra and triangular pyramids was calculated. Upper thoracic volume encompassed a space from the sternal notch to a midpoint on the ventral aspect of the third rib and the lower thoracic volume from the xiphoid process to the midpoint on tenth rib’s dorsal aspect. Results: In hunchbacked sitting during quiet breathing the left lower hemithorax yielded a significantly larger volume (p=0.003), and both breathing patterns during inspiration and expiration yielded a significantly greater change in thoracic configuration (p=0.01, p=0.016). Conclusion: Findings suggested that, in a hunchbacked sitting, there was decreased thoracic asymmetry with re-establishment of thoracic vertebral alignment, consequently stabilizing the sitting position, but breathing was suppressed and tidal volume decreased. Physiotherapy should aim at ensuring correction of hunchbacked posture and maintenance of thoracic symmetry.
topic thoracic volume
hemithorax
three-dimensional motion analysis
hunchbacked sitting
quiet breathing
volitional deep breathing.
url https://www.ijphy.org/index.php/journal/article/view/295
work_keys_str_mv AT shoboa effectofsittingpostureonthoracicconfigurationandchangesinvolumeofhemithoraces
AT kakizakif effectofsittingpostureonthoracicconfigurationandchangesinvolumeofhemithoraces
_version_ 1725174322678464512