Table 2. Comparison of FVC, FEV1, PBU between the experimental group and the control group (Mean±SD).

	Category	experimental group	control
FVC (ℓ)	Pre-test	2.72±0.95	1.83±0.74
	Post-test*	2.90±0.97	1.86±0.53
	difference between pre-and post-test*	0.18±0.72	0.03±0.39
FEV1 (ℓ)	Pre-test	2.42±0.61	1.81±0.70
	Post-test*	2.56±0.70	1.85±0.53
	difference between pre-and post-test*	0.15±0.91	0.04±0.38
PBU (mmHg)	Pre-test	41.18±1.32	41.64±1.29
	Post-test*	44.09±3.08	41.27±0.90
	difference between pre-and post-test*	2.90±2.55	0.36±0.81

* p<0.05