Table 2. Differences in slow vital capacities between the experimental and control groups before intervention.

Variables	Group	Pre-stretching	Post-stretching
Expiratory vital capacity (l)	Experimental*	3.1 ± 0.3	3.3 ± 0.3
	Control	2.9 ± 0.3	2.9 ± 0.3
Expiratory reserve volume (l)	Experimental	1.2 ± 0.2	1.3 ± 0.3
	Control	1.2 ± 0.2	1.2 ± 0.3
Inspiratory reserve volume (l)	Experimental	1.3 ± 0.3	1.2 ± 0.3
	Control	1.2 ± 0.3	1.1 ± 0.4
Minute ventilation (l)	Experimental	15.6 ± 6.6	17.2 ± 7.1
	Control	14.3 ± 6.4	16.5 ± 7.5
Tidal volume (l)	Experimental*	0.7 ± 0.2	0.8 ± 0.4
	Control	0.6 ± 0.2	0.6 ± 0.3

*p<0.05