Objective: The aim of this study was to investigate the effect of corrective exercises on chest expansion in kyphotic girls, aged 11-15.

Materials & Methods: This quasi experirnental research was applied as a clinical trial and had done on 50 girls with postural hyperkyphosis those were selected by convenient sampling and assigned to control (n=25) and experimental (n=25) group by simple randomized method. The experimental group received corrective exercises for 15 days and the control group was given no intervention. Chest expansion was measured before and after 15 days in all subjects. Data were analyzed by use of Chi-square, Paired T and Independent T tests.

Results: There was statistically significant difference in chest expansion of experimental group between before and after intervention (P<0/001), but in control group there was no significant difference (P=0/746). Also, there was significant difference between two groups after intervention (P=0/02).

Conclusion: This study demonstrates that corrective exercises can lead to improvement of chest expansion in kyphotic girls. Further study with larger sample size is needed to support the findings of this study.