Table 2. Between-group comparison of shoulder alignment and muscle mechanical properties (tone and stiffness) (two-way repeated-measures ANOVA)

	Group	Pre	Post	Time F (p)	Time*group F (p)	Group F (p)
RSP(cm)	EG	4.84±0.90	3.96±0.85	104.11(0.001*)	0.031(0.862)	1.786(0.194)
	CG	5.39±1.26	4.48±1.14
PML(cm)	EG	12.05±1.24	13.62±1.38	138.84(0.001*)	1.20(0.284)	0.276(0.604)
	CG	11.64±1.34	13.54±1.03
PM F(Hz)	EG	13.80±1.65	13.24±1.39	26.872(0.001*)	0.856(0.364)	0.103(0.751)
	CG	13.72±1.96	12.92±1.48
PM S(N/m)	EG	260.38±61.48	239.90±54.52	12.092(0.002*)	0.305(0.586)	0.229(0.631)
	CG	247.87±53.09	233.00±42.46
PD F(Hz)	EG	13.94±1.32	12.90±1.08	71.406(0.001*)	5.269(0.031*)	24.31(0.001*)
	CG	14.67±1.22	14.40±1.38
PD S(N/m)	EG	238.03±39.47	208.61±32.69	26.107(0.001*)	3.483(0.074)	6.497(0.018*)
	CG	254.61±41.21	244.78±35.39

RSP, rounded shoulder posture; PML, pectoralis minor length; PM, pectoralis major muscle; PD, posterior deltoid muscle; F, muscle tone; S, muscle stiffness; EG, posterior shoulder stretching with scapular posterior tilting exercise group; CG, pectoralis minor stretching with scapular posterior tilting exercise group; M±SD, mean ± standard deviation.
p<0.05.