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The Effect of Chair Backrest on Respiratory Function in Prolonged Sitting Position
J Kor Phys Ther 2018;30(3):96-99
Published online June 30, 2018;
© 2018 The Korea Society of Physical Therapy.

Chang Ju Kim1, Sung Min Son1, Kyung Woo Kang2

1Department of Physical Therapy, College of Health Science, Cheongju University, Cheongju; 2Department of Physical Therapy, Yeungnam University College, Daegu, Korea
Kyung Woo Kang E-mail
Received May 16, 2018; Revised June 16, 2018; Accepted June 19, 2018.
This is an Open Access article distribute under the terms of the Creative Commons Attribution Non-commercial License ( which permits unrestricted non-commercial use, distribution,and reproduction in any medium, provided the original work is properly cited.
Purpose: The purpose of this study was to determine the effects of a chair backrest on respiratory function after prolonged sitting.
Methods: Twenty-four young healthy subjects (12 males and 12 females) volunteered to participate in this study, and were equally allocated to a backrest (n=12) or a without backrest group (n=12). A spirometer was used to measure the respiratory functions of all subjects.
Results: The chair with backrest group were significant difference in forced vital capacity (FVC), Forced expiratory volume in 1 second (FEV1), and peak expiratory flow (PEF) after sitting for 1 hour, compared with chair without backrest group (p<0.05). The chair with backrest group showed a significantly decreased in FVC, FEV1, and PEF.
Conclusion: Using a chair without a backrest may help to reduce lung function deterioration as compared with a chair with a backrest.
Keywords : Chair backrest, Respiratory function, Prolonged sitting

June 2018, 30 (3)
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