The Journal of Korean Physical Therapy Indexed in /covered by CAS, KoreaScience & DOI/Crossref:eISSN 2287-156X   pISSN 1229-0475

The Journal of Korean Physical Therapy Indexed in /covered by CAS, KoreaScience & DOI/Crossref:eISSN 2287-156X pISSN 1229-0475

Table. 2.

Table. 2.

Comparison of pulmonary function changes in the with and without backrest of chair groups according to prolonged sitting

Parameters Without backrest (n=12) With backrest (n=12) Time Interaction (Timex Group)




Pre Post Pre Post F-value F-value


p-value p-value
FVC 3.78±0.78 3.72± 0.76 3.64±0.71 3.48±0.73* F=28.60p=0.000 F=5.71p=0.026
FEV1 3.20±0.66 3.18±0.67 3.15±0.54 2.98±0.53* F = 27.07p=0.000 F=17.77p=0.000
FEV1/FVC 0.85±0.06 0.86± 0.06 0.87±0.07 0.86±0.07 F = 0.07p=0.788 F = 3.47p=0.076
PEF 6.64± 1.99 6.57± 1.89 6.54± 1.84 6.18± 1.61* F=10.95p=0.003 F=4.85p=0.038

Values are presented as mean±standard deviation.

FVC: forced vital capacity, FEV1: forced expiratory volume in 1 second, PEF: peak expiratory flow.

significant difference between pre- and post-test (p<0.05);

significant difference compared with the control group (p<0.05).

J Kor Phys Ther 2018;30:96-9 https://doi.org/10.18857/jkpt.2018.30.3.96
© 2018 J Kor Phys Ther