Table 2. Change in muscle tone, stiffness of affected respiratory muscles and chest expansion in each group.

Region	Variable	Group	Pre	Post
Sternocleidomastoid muscle	Muscle tone (Hz)	Ribcage joint mobilization	12.9 ± 0.2	13.4 ± 0.3
		Chest wall stretch exercise	13.2 ± 0.4	13.5 ± 0.4
	Stiffness (N/m)	Ribcage joint mobilization	219.1 ± 3.1	229.6 ± 6.3
		Chest wall stretch exercise	236.7 ± 8.0	243.4 ± 10.1
Ractus abdominis muscle	Muscle tone (Hz)	Ribcage joint mobilization	11.5 ± 0.3	12.1 ± 0.5
		Chest wall stretch exercise	12.5 ± 0.5	12.9 ± 0.4
	Stiffness (N/m)	Ribcage joint mobilization	210.8 ± 6.7	221.7 ± 9.8
		Chest wall stretch exercise	231.9 ± 7.8	240.9 ± 8.9
External oblique abdominal muscle	Muscle tone (Hz)	Ribcage joint mobilization	12.7 ± 0.5	13.2 ± 0.6
		Chest wall stretch exercise	12.4 ± 0.3	12.7 ± 0.3
	Stiffness (N/m)	Ribcage joint mobilization	231.8 ± 10.7	236.9 ± 12.7
		Chest wall stretch exercise	227.8 ± 6.4	230.1 ± 7.2
Upper trapezius muscle	Muscle tone (Hz)	Ribcage joint mobilization	14.2 ± 0.8	15.2 ± 0.8
		Chest wall stretch exercise	13.2 ± 0.5	13.9 ± 0.5
	Stiffness (N/m)	Ribcage joint mobilization	256.4 ± 11.1	295.9 ± 23.3
		Chest wall stretch exercise	230.9 ± 8.8	242.6 ± 11.5
Latissimus dorsi muscle	Muscle tone (Hz)	Ribcage joint mobilization	14.1 ± 0.7	14.3 ± 0.6
		Chest wall stretch exercise	13.4 ± 0.4	13.9 ± 0.4
	Stiffness (N/m)	Ribcage joint mobilization	268.7 ± 16.1	280.8 ± 22.6
		Chest wall stretch exercise	247.6 ± 8.9	251.7 ± 8.8
Upper chest expansion		Ribcage joint mobilization	1.3 ± 0.2	1.8 ± 0.2*
		Chest wall stretch exercise	1.2 ± 0.1	1.5 ± 0.2*
Lower chest expansion		Ribcage joint mobilization	2.2 ± 0.3	2.7 ± 0.3*
		Chest wall stretch exercise	1.8 ± 0.2	2.2 ± 0.2*

Values are means ± standard error. *Significant difference between before and after intervention in each group (p<0.05)